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Device (BSIM4) operating-point parameters
Hi,I do have one general and three specific questions concerning operating-point parameters (especially for BSIM4).General question:1. The operating-point parameters are not defined by the BSIM4 model,...
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Encountering errors while running Monte Carlo Simulation using UMC foundary...
I am trying to run Monte-Carlo analysis in cadence virtuoso ( IC617.500.17, Spectre 161). I am using UMC foundry process development kit for the 180nm node. After doing all the steps in running...
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convergence issue
Hi all,during simulation with ADE L I get the following error: (SPECTRE-16927): Transient simulation reaches maximum allowed number of convergence failures below minstep within 5% of stop time. Change...
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Combining/extending monte carlo simulation results
I'm using ADE Assembler (IC6.1.7-64b.500.17).I ran a monte carlo simulation and now I would like to extend the number of runs.The way to go is probably to use the same seed, increase the 'first point'...
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transient simulation result not available by RMB->Plot, but available in...
Hi, I face a problem that I sweep more than 1K corners transient simulations. When it finish without any error, I can't use RMB-plot to show the curve, e.g., "plot across corners". It gives the warning...
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Libscore with Joules
Hi, I am trying to plot multiple liberty files performance at the single plot (w.r.t different FOM, e.g., delay, leakage etc.) any tool that able to perform this? have tried to use Joules but so far...
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How to recognise .GLOBAL statements from CDL models within AMS
Hello,I am running a mixed signal simulation where my standard cell instances are defined using a .cdl model file which contains information like this..subckt adc12_stdcell_ADDFHX4 CO S A B CIM0 net76...
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multiple instances for monte carlo
Hi,I design a small block with a few transistors.I want to see and measure, in my simulations, 1000 instances of this block, as they will be fabricated in Si (i.e. no intentional extreme cases, but...
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Cadence Spectre cannot read library model files
Hello everyone,Recently I am using Cadence Spectre(Version 16.1.0.387.isr6 32bit) to simulate a netlist in command line. However, I met the error when reading the library model file:Reading file:...
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Creating Circles in layout
Hi,I am trying to create a circle in my layout with smallest possible resolution (PDK suggests 5 nm). For this, I used the SKILL code posted before on this forum. The code works for the radius 1 um and...
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Virtuoso Space Based Router (VSR) Routing Methodology
My question is maybe not too relevant for this section (kind of off-topic) but I am very much interested in understanding how does VSR is very fast to route big layouts?. Typically a router is...
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How to append (or write) data into a file in column wise using SKILL/OCEAN
Dear All,I want to add/append data into a file in column wise using Ocean script.In other words, I run my 1st for loop which will add data in row wise in column 1.In the next for loop run the data...
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DFT parameters in spectrum emasurements
Hi all,I am trying to get the DFT of the output waveform to get SINAD and ENOB. There are some things I am not sure about when reading at the help section about spectrum:At a certain point it says:...
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spectremdl pss - access phase noise results
Is there a way to access the phase noise in spectremdl, e.g. phase noise in dBc/Hz at 1MHz offset? The pss sim runs in spectremdl and produces some pss_fd result, but I don't see a way to print that...
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Simulating kT/C noise in discrete-time delta-sigma
Hi, I am trying to get the transient noise of my switched-capacitor delta-sigma in VerilogA. The building blocks are all ideal except the switches, which are modelled as follows:`timescale 1ns /...
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Library Path display issue
I met a problem when I define the library in cds.lib file.If I define like below:DEFINE LIBA PATHASOFTDEFINE LIBA PATHBWHen the PATHA and PATHB all exist, in Library Path, it will show the...
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ADE/Virtuoso Question: .scs File Related
Hello,I'm new to this forum, so I'm putting this post in the area I think it should be in. The questions area. If there is a better place for this post, please direct me there.I'm trying to design a...
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Re-characterizing a tap-less cell library (Cadence Liberate)
Hi All,I want to re-characterize the existing library to a lower supply voltage. I have been provided the extracted (with parasitics) netlist (.cir) of this tap-less cell library by the vendor. > I...
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Probing internal node to dspf file
Hi ,Suppose we have some block "A" inside that there are three comparetor (CompA, CompB,CompC),Now i am running the AMS simulation with including the block "A" dspf netlist.How i can save only the net...
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Voltus-Fi XL in ADE with dspf: how to reliably start 'shapeSever'
Hi All, I'm using Voltus-Fi XL with transistor_dspf generated by Quantus QRC. When I run an EM/IR sim within ADE and then open up Voltus-Fi XL for EMIR 'Layout Analysis', I often get the following...
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