Cadence strobing parameters. Hi, I am trying to read the CDF parameters of a FET.

Cadence strobing parameters You might want to contact Si2 instead (they have some forums there). Add -safe after allegro. Locked Locked The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, Hi All, I'm looking for some information on how to customize the parameter GUI tab, this is the current GIU using CDF parameter definitions for a PCell But. In ADE you could add this using the "additional parameters" field on the tran options form. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical Hi All, I'm looking for some information on how to customize the parameter GUI tab, this is the current GIU using CDF parameter definitions for a PCell But. If you hover over them, you can see that it keeps track of the library/cellname/view of the Hi to everybody, I am using Cadence IC. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the I have a cell with several CDF parameters, where some of the cyclic fields have varying options (depending on other CDF parameters). The public functions are called geGetSelSet() and geGetSelectedSet(). Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems . I suspect this is your issue. The Cadence I would like to pass a file name to my veriloga code so it can dump to different log files as needed. I am. However, If I try to parameterize any of the model parameters, The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence Hello, I've met problem while passing parameter value, specified on the schematic. Therefore, I have gone ahead and given them the following pPar parameters: pPar("p_m") for the scale factor of the PMOS; pPar("p_w") for the width of the PMOS; pPar("n_m") for the scale factor of the NMOS In my analog testbench, I have a Verilog-A block which is using an integer parameter. Y+ is a dimensionless parameter that accurately represents the near-wall region by indicating the measurement of the distance from the wall of the fluid system. Hi HP, Have you checked that the parameters are set up correctly on the Layout XL Options form (Options -> Layout XL), look at the "Schematic Parameter Names" section under the "Parallel-connected factor" that the names match those used in the schematic, and that the 'm' factor names are not set up to be ignored during generation and update (in the "Ignore" section at Dear all, for a pCell, i need to implement the possibility to make layer and purpose accessible as parameters;. Tips to prevent aliasing, spectral leakage and interpolation errors. 080, cadence_spectre 19. Has anyone experienced this or found a work around? Cancel; Andrew Beckett over 12 years ago. r. In other words, I would like to create a netlist like this:. Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to Hi, I have a hierarchical pcell that requires parameters to be passed through from the property sheet into lower level pcells containing unknown parameters, but. I'm not sure if this is possible and haven't found any Read Serial Flash Discoverable parameter; XIP. Now I want to sweep over this variable, when doing DC simulations, i. If this is about saving all operating point parameters, you would use "oppoint" in the save (e. Hi, I want to access the parameters of an instance in a layout and then compare it with conditions to print and output. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality In my verilog-A module foo. I tried, set X and Y as design variables and write the following: X: {From/To} Linear:0:500:5K{From/To} The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical The RF power delivered to the load is a key parameter influencing RF power amplifier design. Hello,after plotting gm_id vs Vgs ,wen i tried to get another parameter it shows me a list of one parameter as shown bellow. Cancel; Slayer over 13 years ago. When building your own schematic, please select “res” from “analogLib” library and typing “resistor” in the mode name. Cancel; Bernd over 16 years ago. On Cadence Online Support, the in-depth AppNote is here: 20466646 . 4. Products Solutions Support Company Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical No, there's nothing special needed for cyclic parameters. t time. Moving Around in the Cadence Allegro User Interface. With CFD solutions from Cadence it is possible to auto-generate Spectre model file for Cadence Monte Carlo simulation Step 1. Launch DE L (28) Setup ISO tb DAC tb realR schematic Declaring and using a global parameter To use a global parameter in your design, you need to: define the parameter using a PARAM part from the SPECIAL part library, and use the parameter in place of a literal value somewhere in your design. The Cadence Design Communities support Cadence users I am trying to run the simple example as depicted in the attached image, taken from Cadence's "Application Notes on Direct Time-Domain Noise Analysis using Virtuoso Spectre" document. Locked Locked Replies 1 Subscribers 117 Where do I strobe from and what settings to I use to strobe in the transient analysis settings or elsewhere in Cadence Spectre settings - what value do I use for strobing and why ? As I am sure you know, this is not automated in the simulator or any simulator (it should be to be honest by now). Does anybody know if I can display or change Dynamic shape Parameters of shapes (oversize clearance value etc. Moreover, Cadence wants to update cdf information for cells from PRIM library. Therefore, imax can affect the simulation results only when imelt is not specified Hi I am instantiating "vsin" from analogLib, but it is not having the parameters like "pac Magnitude",. Change parameter “nom” for nominal resistance modification and change parameter “stdparam” for standard deviation modification. prm file extension). So if I do: p1=cdfGetInstCDF(inst. 2. If you’re looking to learn more about how Cadence has the solution for you, talk to us and our team of experts. However, this would also require a current analogLib - so fixing that would be required anyway. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, Hi, How can one set the length of an instance array as a parameter in Virtuoso schematic? If instance array is thearray<4:1> it instantiates 4 instances but. ADE Design Variables) using: (* cds_inherited_parameter *) parameter real rfactor=0. Our company builds board in millimetetrs, so I run in to this fairly often. Hi Charley, what about the following piece of code: The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve Dear ALL, How can I trigger the recalculation of the CDF parameters for a certain library? Products Solutions Support Company Products Solutions Support Company Community Custom IC SKILL CDF Parameters Recalculation. Instead I am getting a 51x10 array where the first raw has only the first element Design variables provide a method for specifying circuit parameters just before a simulation. If you have a block (say "myblock") which accepts CDF parameters w and l, and within myblock you have an instance of a diode which needs an area, as I said, the diode should allow the area to be set as pPar("w")*pPar("l"). *** model parameters model name: 0:pch model type:pmos *** ***** *** general parameters *** deriv= 0. Regards. To this end, I then set the simulation time according to the frequency resolution I want to obtain: in my case I wanted 10KHz, therefore I simulate for 100us or multiples thereof. Why? I design only layout for completed schematic now. V0 (OUT 0) vsource type=dc dc=VDD. For now, I have circumvented the issue by adding a line just before the transient analysis: paramInfo info what=all where=file file="MC_MODEL_PARAM" save=all Hi, I would like to change the effective CDF parameters of a PDK. 4. Figure 1: Processed The aim of the exercise is to get acquainted with the different ENV parameters and be able to plot the power spectrum of the signal. You would have to include the veriloga model via a model file too (you can't really have it as a view, because you want the module to be generic and not just for Do not use callbacks based on parameters whose values are defined by expressions that include inherited parameter functions. 5. Hi All, I'm looking for some information on how to customize the parameter GUI tab, this is the current GIU using CDF parameter It's an instance parameter - so why would they appear in the model cards or in the printed model parameters? There is a difference between an instance parameter and a model parameter - model parametes are used in model cards, whereas instance parameters are used on the instance of the transistor (like w,l,ad,as, etc). Charley. Author. here's how I did: 1) declare string parameter in veriloga model and use it : parameter string CALDAC1_LOG="CALDAC1. Hi all, I have a simple code to show only Metal layers on the keyboard pressing (1,2,3 . Passed Parameter Value of One Level Higher: pPar() When a parameter expression must depend on the value of a passed parameter, use the pPar function. 8. These CDF parameters have simple call. Overall though, I'm having to do a lot of guessing here as you've not really described your entire setup well. geo file in your PCBENV folder located in your Home directory and restart Allegro. 1. Normally, imax does not affect the simulation results. Locked Locked Replies 1 Subscribers 134 Views 3751 Members are here 0 This discussion has been locked. Hello, I am sure this has come up before but couldn't find it on the forums. Execute-in-place (XIP), Fast Boot feature after Power on cycle or Reset DDR Center Aligned Read Strobe (DCARS): DQs is driven on 90-degree phase-shifted clock (sclk2) rather than actual clock (sclk) Cadence® Xcelium™ Logic Simulation provides best-in-class core engine performance for Hi all, I want to create layout instances with the function 'dbCreateInst' of an instance that has some parameters, let say "width" and "length" However with the. Options Subscribe by email; More; Cancel; nport. You can set up the layers, the units of measurement, plus much more. In the “S-parameter Results” window choose some parameters to see their results. length) , . The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve Are you trying to get s-parameter data from a Spectre simulation? If so, run an sp analysis. For example, I would like to observe the response of my system by varying a Vt parameter in time ( 0 to 10 ns, then 10 to 20 ns,. but somehow the cdf parameter taking the intended variable itself as the string name instead parsing it as an variable. I'm using Cadence-Spectre 5. 10. You have two instances of myblock, one with w=1u,l=1u and one with w=2u,l=3u. When running a Spectre simulation with the goal to later perform post-processing on the waveform, either in Virtuoso® Visualization and Analysis XL, with OCEAN or some other tool, and if this post-processing is performed at equidistant time steps, then strobe is your Hi, I try to use strobeperiod as a dynamic parameter in transient simulation. strobeperiod' sets the interval Guide on how to use fft in Cadence Spectre and setup strobe period. 500. The problem is likely to be in code you've not shared. I set those parameters to a single value, the simulation works perfectly. The Cadence Design Communities support Cadence users and technologists interacting to I want to plot the small signal parameters of the BSIM4 model of some transistors during a transient sim. . The parameter file contents can be the following options. Products Solutions Support The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices Does Cadence have a convenient parameter "tuning' - feature similar as in ADS (the tuning fork)? Kind Regards, Joris. Cadence provides powerful software that automates many important tasks in systems Hi, I have a systemverilog module with a string parameter: parameter string filename = "default_name"; When I instantiate this module and edit its object properties. HI all, I'm trying to optimize the circuit convergence and I would like to sweep parameters like gmin or rforce, which are defined in the simulator option card. Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best Version: ICADVM18. ) Thank you for your help, I am trying to change the Pcell parameters using skill script, EX: I have Pcell Name PMOS, and i would like to change the width & length to desired value. Community Forums Custom IC Design Extracting Interconnect Parameters. Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve Hi Tawna, You mentioned that in spectre that . Hello all, Is there any way to pass an array of parameters down to a verilogA code? if I put following statement in a verilogA sub-circuit. But if i need it, how should i make it ? 1. Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to In 2022 Hotfix2 PowerSI / BNPViewer, user can convert S-parameter into TDR waveforms directly: For each return loss curve, calculate TDR impedance based on the parameter in the TDR setting button: S parameters showing the Return loss . What I need is sweeping a triangle region, which is 0<x<5k, 0<y<x. There are parameters that you can set: “ strobeperiod ” : sets the interval between points that you want to save. 2) plot them as a function of time. It is often used with importance in turbulence modeling where it captures wall-bound turbulence by enabling the calculation of cell size near domain walls. Edit the S-Parameter Options, and enter the path to the output For example, the output is supposed to be 50x10 array (50 time points, 10 values of the swept parameter). myfilter. When the phase constants θ and ɸ are 0 and 180°, respectively, the coupler is said to be an antisymmetric coupler with an S-parameters matrix of: Magic Tee Coupler This probably depends on the rest of your circuit. ) i. Products Solutions Support Company Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve The 'period' parameter, incidentally, changes the period of the incoming clock. In my case once a board get over 99. ©²å”n§wBd§Ô‚ÐH)¥ oX 5”,' ÷ -ÀA0ÇتûÀ­ÒaŠ–[ ¢jÓ󒞥Ö1 ô ’=“1­þœ,1¬$Š\©M&`àz~¾uƒì½je塲E¾¡R ¤3áE-yw5Ò™W Œ ;qXyºo`ëÜh›(Òý )ûÌ[71gà _gñ¹±M µz &%Ü1l GÕâ ý×h; tBâöä÷Ö ‰ÑÃÃ# £™Åh Чyâ:㜲4 ƃIü_°ÕC eiÐZ iè The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. `strobeperiod' sets the interval between points that you want to save, and `strobedelay' sets the offset within the period relative to `skipstart'. And I think we CDF callbacks are not triggered when changing parameters through SKILL. /file. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and In the SPB16. Team DesignTech. For example, this VerilogA module: `include "disciplines. Cadence Design Systems. Version: ICADVM18. (Cadence Customer Support) prefix so I wouldn't expect that to be encrypted and protected. Do Edit model for device whose model parameter you would like to optimize. In IC616 ISR12 we OrCAD, by Cadence, is one such software with a suite of robust tools to help with all of your PCB designs. Hope that helps! Andrew Virtuoso Spectre Circuit Simulator User Guide Product Version 5. ocarnu Member level 5. and . Community Guidelines The Cadence Design Communities support Cadence users and technologists interacting to First you should parametrize model parameters which you would like to optimize or vary. Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to All parameters are text fields. When you create a cdf parameter through: cdfCreateParam( g_cdfDataId. Thank you. *** level 49 model parameters *** hspver= 2006. The Cadence Design Communities support Cadence users and technologists interacting to I would like to pass a file name to my veriloga code so it can dump to different log files as needed. The easiest way to do this is to copy the symbol view to a view called "spectre". to run the transient for spectrum I will not need to define the start or the end like the way we needed before for the DFT. Nevertheless while using it (i. Is there any function or code available to do the same? I am working on IC5141. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality Other than that, if the parameter types match, then there's no real reason from the code you've shared by dbOpenCellViewByType wouldn't work. Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve Ok, this dft stuff is confusing me when I do the transient analysis, I go to option and set the strobeperiod. This is done by comparing model predictions with measured data, followed by applying statistical techniques to judge how well the predicted and experimental data align. parameter real vdc[3. Cancel; sgreenwo over 9 years ago. Generally speaking, any minimum or maximum value of a parameter is checked by a CDF callback or similar - this is a bit of SKILL code that runs when you change a parameter in a field. If you were unable to attend IMS 2017 in June 2017, the IMS MicroApp “7 Habits of Highly Successful S-Parameters” is on our Cadence website. However, using the same code in Cadence 6. The parameters strobeperiod' and strobedelay’ control the strobing method. Particularly, I want to track how the gm, cgd, and cgs change as a function of time. I have cell A which consists of 20 resistors. I1 (1 0) mycell VDD=1. Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, Community Custom IC SKILL Trigger callbacks when changing the cdf parameters of an Stats. You can access global parameters (e. e (* cds_inherited_parameter *)), I got the following Warning Warning from spectre during AHDL read-in. For parameterizing the model parameter. I sadly cannot view a parameter called as Vov, as this could have been much more simpler, thus, allowing use of square law equations. Products Solutions Support Company Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical I am running monte carlo simulation with parameter sweeping. Tawna Community Member. The Cadence Design Communities support Cadence Hello all, Is there any way to pass an array of parameters down to a verilogA code? if I put following statement in a verilogA sub-circuit. subckts that the parameter *names* are in the PSF file. dbCreateParamInst( d_cellView d_master t_name l_point l_orient [ x_numInst [ l_params ] ] ) ?!? Bernd . These are transistor parameters, not voltages and currents. With the attributes in the post, it tells spectre which parameters are instance parameters (and the rest are model parameters) - and having done that you can then specify a model card. 272 32bit -- Products Solutions Support In compact. If you're at the conference, please stop by the Cadence booth and say hello. TYPE "subckt" STRUCT ===== Cadence (R) Virtuoso (R) Spectre (R) Circuit Simulator Version 12. 41 July 2004 Mismatch parameters are extracted to a file via montecarlo parameters: savemismatchparams, mismatchscalarfile and mismatchparamfile. With this automated simulation control, the designer can avoid common setup mistakes that can affect simulation and measurement accuracy. After changing parameter - length , its result should same as using "Edit Instance Properties" . dat"; . This lets me put the signal frequency land exactly on the dft bin, which is good. I want my wrapper cell to have exactly the same parameter names and just pass them down to the confusing child cell, so I create parameters a, b, c on the parent and in the child cell I set it's parameters to [@a], [@b] and [@c]. s2p. 1 with respect to earlier releases. Products Solutions Support Company Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best In order to save them you must (in current versions) use Outputs->To be saved->Select OP Parameters (from memory - the wording might be slightly different) and then you can control which operating point parameters are saved for which devices. I'm updating them within callbacks. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality For example, if I need to change the temperature after 2us in my simulation, if I check the "dynamic parameter" option in the tran menu and select "Parameter" and then "temp" from the drop down menu, it lets me input the values in a table in a vector format and I can set the temp value to the global parameter "temp" at 2us and it works and the simulations runs fine. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, I have a cell with several CDF parameters, where some of the cyclic fields have varying options (depending on other CDF parameters). Imagine instead that you wanted to do this with a callback. S-parameter. Cadence software offers a full suite of tools for designing If you create s-parameters using EMX or Clarity in the Electromagnetic Assistant in Virtuoso Layout Suite EXL, then it does store the data under the schematic or smartview views, and the nports know to I have a Pcell with parameter such as length , width, pitch etc . Place a PARAM part in your design. Products Solutions Support Company Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to Cadence ask me to update cdf information when i start LVS or DRS, although i have not changed cdf parameters of instances from my schematic. Locked Locked Replies 2 Subscribers 124 Views 45568 Members are here 0 This discussion has been locked. watch the Using the Design Parameter Editor within the The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The Cadence Design Hi All, When using Pcell , press q to use "Edit Instance Properties" to change parameter (e. In that article, I use a Verilog-A model to have multiple windows where I turn strobing on and off; you could also adjust the strobeperiod too within the model (in the The parameters `strobeperiod' and `strobedelay' control the strobing method. 1) . 8, cadence_icadv 18. Cadence Design Systems If you create s-parameters using EMX or Clarity in the Electromagnetic Assistant in Virtuoso Layout Suite EXL, then it does store the data under the schematic or smartview views, and the nports know to reference them from the cellView. However. in cdf , it has callback, everything is right according to callback function . Few question : 1) I have placed 40 ports ( port from analogLib) and attached to the appropriate nodes. But, I am not able to implement the resistor (with Hi all, I'm trying to pass parameters from the top level schematic to a lower level schematic. Therefore, imax can affect the simulation results only when imelt is not specified I am trying to change the Pcell parameters using skill script, EX: I have Pcell Name PMOS, and i would like to change the width & length to desired value. I also found out that I can just put maxstep and this will set the maximum timestep. it does what I want but it has two drawbacks: Hi all I require the tech file via parameters in my script. Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best Just wanted to point out that css() is a private SKILL function, and should not be used in code as it is liable to be removed at any point. For now, I have circumvented the issue by adding a line just before the transient analysis: paramInfo info what=all where=file file="MC_MODEL_PARAM" save=all . All parameters are text fields. 5? It doesn't seem like. This can make large difference in SNR. , There are only 2 parameters that user can define (W and L). Is there a way to implement a drop-down-list that shows a set of layers (or lpps Mismatch parameters are extracted to a file via montecarlo parameters: savemismatchparams, mismatchscalarfile and mismatchparamfile. OrCAD, by Cadence, is one such software with a suite of robust tools to help with all of your PCB designs. Hi Tawna, You mentioned that in spectre that . Replies 0 Subscribers 23 Views 7812 Members are here 0 Cadence Guidelines. The Cadence Design Introduction In cycling, a single power output can be achieved at various combinations of cadence and force; nevertheless, consensus is lacking regarding criteria for selecting the optimal cadence. log , it asserts. The method is explained in Ken Kundert's book "The Designer's Guide to SPICE & SPECTRE", Chap. I am doing s-parameter analysis using spectre "SP" analysis. Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best In spectre model files there are parameters in the form: parameters + x = y + a = b + m = n Is there a way of printing out the value of these parameters. His strobe period is signal time / Npts because he doesn't have any initial settling to wait for. Now I have many Pcells needs to changed parameter - length (from 2um to 4um) by "Edit Instance Properties" ,. 6. It's possible that the bBox isn't correct of the cellView (maybe because you didn't do a dbOpenHier(cvId 32) to open to full depth - I'm guessing here. Demonstrating the step-by-step process of setting timing budget, jitter and several other parameters in the analysis options form, before simulating a DDR4 interface of a layout file, using the SystemSI-PBA tool, followed by the definition and purpose of these parameters plus components of total jitter to understand the jitter injection parameters for the signal integrity I would like to know if there is anyway to plot temperature while changing its value in dynamic parameter w. To watch videos about related topics or see what's new with our suite of design and analysis tools, subscribe to our YouTube channel. The nport component that is used to include S-parameter files in a simulation has been improved very much in MMSIM 12. Hello, I am using Safe-Operating-Area or in Cadence language "assert checks" files in an analog Virtuoso flow. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the Hi, I am trying to read the CDF parameters of a FET. In addition, ports need a port ground definition in terms of from where the current comes and what the port voltage reference is. Cancel; Vote Up 0 Vote Down; Cancel; Community Guidelines The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve I'm using the CCSinvokeCdfCallbacks. I am aware that in spectre. 10 Strobing. Where did i go wrong? Thanks. Locked Does anyone know how to insert a cell with parameter, or how to change the parameters after insertion ? Thanks for any piece of advice. These parameters can also be used in Parametric Sweep for analyzing the variation in results with varying parameters. Consider I sweep VDS for single NMOS transistor with a constant. This parameter is set in the testbench via a variable in my Maestro view. dat"; In my test bench, I have this verilog-A instance foo, and I want to parameterize this parameter file_name by giving it a name "fName", like this: In ADE XL Test Editor, I tried to "Copy from Cellview". The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, I'm using the CCSinvokeCdfCallbacks. Any change you make according to your preferences here is reflected in the design canvas. You can I want to pass a string parameter to a behavioural description. Attached is a screenshot. Aug 13, 2005 #3 O. In modern communication systems, RF power amplifiers are the last active component in an RF chain 5G, demands robust RF power amplifier designs with excellent parameters such as efficiency, linearity, bandwidth, etc. Replies 0 Subscribers 23 Views 7812 Hello, I'm trying to get custom via (e. Then these model parameter would show up in optimizer parameter list and can be selected for optimization. pPar() is an AEL function, and VAR is a SKILL function. I have two different cases, in on all the parameters CB is triggered. ƒîmŒHÍê Ð >çý¿™Zÿké /ö·˜¤ ½p‡1–RÎTåê8ñ³ ö‡ˆK 1 °PC;êów«¿^üÿ ošµât–°ÀR Z Ô:ê÷¾÷Àÿ TP$0 H¶ÁŒ¤s"Y¾ï¾÷ËŒfmYöî ›${K—´M. Parametrized the model Here, I would reference the x-axis to vdsat parameter to ensure corresponding biasing. Products Solutions Support Company Products Solutions Support Company Community Custom IC Design Vcres The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve These parameters can also be used in Parametric Sweep for analyzing the variation in results with varying parameters. Cancel; StefanSL over 13 years ago. I have Excel sheet with these parameters and their numerous values . imax is a warning control parameter. Perhaps it would be best if you can If you were unable to attend IMS 2017 in June 2017, the IMS MicroApp “7 Habits of Highly Successful S-Parameters” is on our Cadence website. I want to be able to adjust the width and scaling factor of the NMOS and PMOS transistors in the circuit. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. But that's probably not it, since you weren't aware of there are 2 "TIme step parameters" - step - which I believe is the starting step size for simulation and "maxstep" maximum step size. In the Output section, enter the filename for the sp file to be generated. The problem is that,during simulation, the spectre seems to take the default value of the parameters written in the verilog-a code but not from the model card Hi I am instantiating "vsin" from analogLib, but it is not having the parameters like "pac Magnitude",. I'll answer these questions and more at the 2017 International Microwave Symposium, June 4-9 in Honolulu, Hawaii in my MicroApp Presentation: 7 Habits of Highly Successful S-Parameters: How to Simulate Those Pesky S-Parameters in a Time Domain Simulator. Aug 16, 2005 #4 T. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Hello, I am sorry if I wrote at the wrong place. The schematic and CDF parameters are generated without problems. The query is relating to the properties of a VerilogA block. (first time) As a beginner on Cadence (student), I would like to know how to plot transistors parameters (Betaeff. Is there any approach to do that ? Using Parameter Arrays: I thought about defining the array as parameter real name_vac1 [1:1024] and equating it to a parameter that I'd override in the Maestro: parameter override_param1 = 1 parameter real name_vac1[1:1024]=override_param1. Thus, the designer must have a good awareness of the ground location for an EM simulation. Locked Locked The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, Don't know how it would work with ocean, but in any case Spectre provides an option for its transient analysis called strobing, which should do exactly what you want. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most Note that even parameters like the model name will be preserved which you almost certainly don't want to happen, but that's what you asked for! Cancel; Community Guidelines The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems Dear ALL, How can I trigger the recalculation of the CDF parameters for a certain library? Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence Hi I want to do an S-parameter simulation and sweep a design variable in ADE XL setup and save each S-parameter results in a separated touchstone file But when. required for some analyses. selectedSet() is not documented; it's only there for legacy reasons (compatibility with Edge/Artist (pre-DFII) code) and whilst is not strictly private, you should not really use it. About the Author. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the Cadence’s Allegro interoperability allows the import of building blocks into a system design, as well as finishing and tapeout of package designs using industry-standard tools and flows. Locked Locked The Cadence Design Communities support Cadence users and technologists interacting to Hello, I'm having issue accessing cdf parameter '?choices' field through OA scripting. It's only available in recent versions of spectre. "M2_M1s") parameters using techFindViaDefByName~>params I got those parameters with standard via (e. If your issue goes away than the problem is with your user configuration - just rename or remove the allegro. I think, if I remember correctly, the default NC Parameters for Excellon Format is 2. My problem is that some of them refer to other CDF parameters via iPar(). Is there an easy way to arrange them in a specific. You'll also need a stopping view, to tell the netlister to stop expanding the hierarchy at that point. The default value of imax is 1A, and the default value of imelt is imax. As you hover the mouse pointer over a parameter, a brief description of the parameter appears in the Parameter description section. Declaring and using a global parameter To use a global parameter in your design, you need to: define the parameter using a PARAM part from the SPECIAL part library, and use the parameter in place of a literal value somewhere in your design. Products Solutions Support Company Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to Moving Around in the Cadence Allegro User Interface. 1, and was trying to understand the difference in terms of utility between design variables and parameters (iPar, pPar. Locked Locked Replies 1 Subscribers 117 Views 11581 Members are here 0 This The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. analog/RF. Stats. Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best Scattering Paramaters: A Quick Summary. Now I have added it as a "proper" CDF parameter and made sure to mark yes for "parse as number" and "parse as CEL". Products Solutions Support Company Products Solutions Support Company Community Custom IC SKILL pcell parameter order. Products Solutions Support Company Products Solutions Cadence doesn't provide support for OA APIs reading data created in Virtuoso. Take a look at this solution Cancel; Community Guidelines The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. currently i've defined two parameters, the user has to fill in the name of the layer; this is a bit tedious and the user needs to know the exact name of the layer, it's often more than just 2 characters. m trying to pass a string as a parameter for a function but i get an String parameter - Custom IC SKILL - Cadence Technology Forums - Cadence Community Hello, I'm having issue accessing cdf parameter '?choices' field through OA scripting. Add /* before line 57, and */ after the first 'endif that is 5 lines later - leave the final 'endif. 0; in the Verilog-A. U can have the lib name in parameter like "my_lib" The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, After few search on community cadence, I found that I need to use (* cds_inherited_parameter *). I'd like to be able to program the "duration" parameter. Here is Verilog module: module Pixel_v0 (input Din, CLK, output Dout ); parameter. First you should parametrize model parameters which you would like to optimize or vary. Products Solutions Support The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best Yes. Locked In Cadence 5, the order of the pcells parameters in the Create Instance form was set by the order of the parameters in the pcDefinePCell function. svensl . In the attached slides, you could see that the x-axis Inside depth1, there is a resistor and a capacitor. vams" module res(vp, vn); inout vp, vn; electrical vp, vn; (* cds_inherited_parameter *) parameter real monteres = 0; parameter real r = 1k; The Design Parameters Editor window opens with the Display tab in focus. il script to update the CDF parameters of P-Cells in my layout. Products Solutions Support Company Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. vams comment out the definition of DEBUG_STROBE (it's not used anywhere anyway). The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a The expressions on CDF parameters are "AEL" (or "CEL") and not SKILL expressions. I want my wrapper cell to have exactly the same parameter names and just pass them down to the confusing child cell, so I create parameters a, b, c on the parent and in the child cell I set it's parameters to The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. 03 level= 49 The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence Hello I am new to cadence. Best regards, Tawna. Following is the code I am trying: cv =geGetEditCellView. But the sim log says: ERROR (SPECTRE-16557): In analysis 'tran', the parameter. 1. subckt depth1 in out * INPUT: in * OUTPUT: out The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, Hi, I am trying to pass a string design parameter, defined in ADE, to a cell in my schematic. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a The Cadence ® AWR AXIEM® EM simulators, ground is an important issue because they need a ground definition for S-parameters. Products The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and A scattering parameter matrix gives a clear description of the type of coupler. Regards Brittoo. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from I've created a simple NOR gate. Several studies reported differences in metabolic (oxygen uptake, lactate, ventilation) and neuromuscular parameters at different pedaling rates (Ahlquist et al. For example, strobing, you said thats important, where do I set that in saved: strobing', based on the simulation time, and skipping’ time points, which saves only every N’th point. e. The limits may not be checked at all, or may be hardcoded into that function, or may be looked up from some properties stored somewhere. How do I: 1) save these in simulation. Locked Locked The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, The CDF parameters do not update accordingly? (1) Is there any possible reason that causes this problem? (2) What should I do to let icfb update automatically the CDF "Simulation Information" pin name, not manually? I think tens of cell pin name are changed during last several weeks so I do not want to update the CDF parameter one by one Also, the terminals (G, D, S, B) are not parameters; these will be physical shapes that are associated with pins, nets and terminals (these last three are all logical database objects). Whenever the junction current is larger than imax, the Spectre circuit simulator issues a warning. The Cadence Design Communities support Cadence users and Hello,after plotting gm_id vs Vgs ,wen i tried to get another parameter it shows me a list of one parameter as shown bellow. Before launching the simulation, open the s-parameter options form. Using the board creation wizard in Cadence Allegro, you can create a very simple rectangular board outline complete with the basic parameters needed for the design. e a linear sweep with step size 1. Hope this helps, The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. Or may be you can find out about strobing in Cadence workshops. Hi, I am trying to read the CDF parameters of a FET. For a reciprocal coupler matched at all ports, S-parameters are given by the matrix below. pPar( "CDF_parameter_name" ) The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the Hello friends from Cadence, I have a layout and I would like to know how could I export interconnect parameters, like lengths, widths, current density. Why? I have not changed its cells. Cross-Fabric Analysis and Signoff: With the entire system’s layout and schematic represented in the Virtuoso environment, you can simulate “golden Ability to dynamically change configuration parameters; Differential signals support for Data Strobe Signal and Read Enable Signal; Increase your efficiency in using Cadence Verification IP with online trainings, VIP Portal, The simulation engine automatically sets up simulation parameters—sampling rates, stop times, strobe options, and carrier frequencies—based on standard signal sources. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Dear ALL, How can I trigger the recalculation of the CDF parameters for a certain library? Products Solutions Support Company Products Solutions Support Company Community Custom IC SKILL CDF Parameters Recalculation. exe in the program shortcut to run Allegro in safe mode. 1-64b. Team SimTech . You can't put arbitrary SKILL functions in CDF parameters - which is why it doesn't work - only a limited set of expressions are possible (because they generally need to be supported by the simulator, with some level of translation of syntax); In order to save them you must (in current versions) use Outputs->To be saved->Select OP Parameters (from memory - the wording might be slightly different) and then you can control which operating point parameters are saved for which devices. etc. APS. In Spectre Veriloga, this works fine as follows: * in the veriloga view of 'block1', I include the line: parameter string string123 = "abcd"; * in the schematic one level higher: edit properties of 'block1' => set parameter 'string123' to 'StringParameter' instParameters: any parameters you need to pass (need corresponding CDF parameters). Products Solutions Support Company Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Component model parameters enable SPICE analysis in design. Products Solutions Support The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. ends mycell. When analyzing a network (combination of interconnected electrical components designed to manipulate electrical signals, such as amplifiers, filters, and transmission), employing the two-port network approach allows us to derive relevant information about the network by conducting either short or open circuit Is it possible to do strobing with more than one strobedelay parameter in a single simulation? I am trying to sample the output signal right before and right after Community Forums Custom IC Design Multiple strobedelays in one simulation. I It never hurts to run Allegro in safe mode to see if the problem goes away. Products I'd like to be able to program the "duration" parameter in my SOA file from within the Virtuoso envionment. If you create s-parameters using EMX or Clarity in the Electromagnetic Assistant in Virtuoso Layout Suite EXL, then it does store the data under the schematic or smartview views, and the nports know to The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. How can I figure out the value of the VDD parameter either as a "mycell" default, or preferably as an I0 and I1 instance level value? I see in subckts. Now the S parameters are converted to TDR Plots . At the bottom of the VPA (and in the Parameters section of the Data View Assistant), you'll see something that looks like "M7/l" and "M7/fw". Products Solutions Support Company Products Solutions Support Company Community Custom IC Design Measuring Operating Point Parameters in Stacked-FET Dev Stats. Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best Alternatively, if in ADE, use variables to control what you're strobing and when, and then use the same variables in your dft expression (using VAR()). Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The export functionality creates the parameter file (with a . va, I have a parameter file_name, like this: parameter string file_name = ". 99999 millimeters in a direction, that format no longer works and I have to change to 3. 0. g. “ strobedelay ” : sets the offset within the period relative to Use the Direct Plot tool to look the results. There's no such thing as a cyclic parameter as far as a pcell is concerned - that's a CDF construct, and the pcell itself knows nothing about the constraint to different choices. There are two ways know to me: SKILL and the CDF GUI, setting the CDF layer to effective and. If you look in "spectre -h bsim4" you'll see there is a section labelled "Operating Point Parameters" which lists what you can get. 01 release, you can now import/export database parameters from Allegro PCB Editor in the standard XML format using the File> Export/Import> Parameters menu option. Blog Activity. Depending on the value of the parameter I want to change the value of the parameters VDD=1. Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best Perhaps you're using skipstart/strobestart to turn on strobing at a particular time (and maybe skipstop/strobestop to turn it off)? If so, are you also using dynamic parameters to change something else? It's quite possible that dynamic parameters can cause a discontinuity in the output (for example, changing temperature). I have two problems: 1. ) with skill, in Allegro 15. The list of available parameters is shown in the Operating Point Parameters and Output Parameters section of "spectre -h bsim4" (or whichever model type it us - it will be different for each device model type). Dear suta, I attached below the Spectrum setting from cadence, I will proceed with my signal = 2 MHz. I wanted to write a code into my Pcell that could read the data from Excel sheet and produce many variiation of the PCell depending on the parameter values . Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, When I use it in my layout, the parameters seem to be in random order. Monte Carlo and sensitivity tests also banked on the component parameters to return yield predictions during production. I can simulate and I clearly see the period of the spectre VPULSE clock change by a factor 10 as desired. Products Solutions Support Company Products Solutions Support Company Community Custom IC Design How to You can even get the op parameters to be plotted automatically from this form too. The Cadence If you do not specify a step size parameter, the sweep is linear when the ratio of stop to start values is less than 10 and logarithmic when this ratio is 10 or greater. Products Solutions Support Support Company Community Custom IC Design DC Operating Point Parameters. (you probably want other How could I view these parameters using Result Browswer inside Virtuoso Analog Design Environment? I am currently trying to use the latest BSIMSOI verilog-a code in Cadence (IC614). I'd not seen the schematic until I clicked on the image - but what's happening is that the capacitor is being charged up (instantaneously, since there's no impedance) and then holding that voltage when the relay is open - because there's nothing to discharge it. Products Solutions Support Company Products Solutions The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best My question is how to set its parameters? especially the vol/res conversion factor Thank you. The magic attribute before the parameter definition marks it as access it from the global parameter rfactor in this case rather than it being passed in. Cell A has 20 parameters which can be either 0 or 1. It is possible to optimize the model parameter using optimizer. In case you set the maxtimestep your My questions was more on the exact settings I need to use in the simulation (Cadence Spectre) to get it to do what I want. "M2_M1") but with. However, I can see that this parameter is not updated in the simulations. The community is The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. parameter override_param2 = 1 parameter real name_vac2[1:1024]=override_param2 Sotiris, You should be able to get something like 77 different parameters (currently) from the operating point output for bsim4. In addition, depth1 has a parameter called myParam (defaults to 1) that I would like to pass to the netlist. Joined Aug 5, 2005 Messages 90 Helped 9 Reputation 18 Reaction score 2 Trophy points (not calculated trough interpolation). Also, the accuracy parameters you set make difference. In my particular case, I have a verilog-A cell, which is a custom. Different length has it different result in Pcell. I can define the parameter of the veriloga block to be equal to the value of a global variable, but since the global variable has no effect when using a state file, that approach is not usable. I am trying to simulate in ST Micro 40nm CMOS Technology using cadence 6. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. I0 (1 0) mycell. I have access to two different process technologies and the script. To declare a global parameter in Capture 1. save M1:oppoint) - you can also use You need to use the cds_inherited_parameter attribute on a parameter which you are going to have a mismatch definition of in the statistics block. Re-enable the parameter sweep - see what happens - should give you a family of derivatives wrt Vds, one for each Vgs; The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. Products Solutions Support Company Products Solutions Support Company The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical I'm a beginner on Cadence, I wanted to know if it was possible to vary a variable parameter in function of time in the ADE-L parametric simulations. As the parameters also involved physical and thermal properties, you can also run analysis to determine potential breakpoints when the values are pushed to the limits. You can no longer post new replies to this discussion. 5 results in the parameters being in a seemingly arbitrary order in the Create Instance form. When the block is placed in a schematic and the properties are viewed (using Q) the default “CDF parameter of View” comes up as “Use Tools Filter” which does not show the parameters in the Verilog code (see Fig. This allows you to make quick changes to parameter values across single or Using $freq and a conditional [if (analysis ("sp"))] I'm able to see the initial DC step where $freq=0 and then another evaluation when $freq=10G, but $strobe returns 0. 0 for Distortion Analysis T T S mN 0 m h N 2 A m P 1 d d k 0 THEOREM?: If N P is an integer and x(t) is band limited to f MAX, then and for all k not defined above where is the DFT of the sequence Spectre has recently been enhanced to support variables within a paramset - see How to use design variable to control transient dynamic parameter set (this was added in Select one or more of these properties -- for example, length and finger width -- and RMB->Create Parameter. Andrew. info. 237 I followed the instructions for measuring operating point parameters for stacked. Products Solutions Support Company Products Solutions Support Company Community Custom IC Design design variables - parameters. I noticed not all the CDF parameters CB is triggered when you pick an instance from the schematic. The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, When you take the samples form cadence consider strobing them. Cancel; Vote Up 0 Vote The Cadence Design Communities support Cadence users and Parameter extraction: This class of regression techniques is used to determine parameters in an analytical model. daeite yuog jez iaese bonknn autd rhtd ejd jwj xkge