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Virtuoso ADE no options
No options are shown in Cadence Virtuoso ADE: after dc analysis.Results> Print> no options are highlighted
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IF Statement with strings
During spectre simulaiton, I am working in an RF model where I have to select the the netlist based on the port that is selected and pass as a parameter.Can I do this with an if statement (I can do it...
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Sweep errors
HiIn out lab whenever we use Sweep in Cadence Virtuoso the result we get is TOTALLY different compared to the case that we simulate point by point.It has happened to all of us, both with transient and...
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EVM of 256-QAM with envlp analysis
Hello,I am a student, and new to Cadence and SpectreRF. I need to the determine the EVM introduced by outphasing PA's in case of 256-QAM, preferably by using a fast envlp analysis (instead of a much...
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avoiding "hidden model in spectra rf" for verilog A integrator code
hi all ,i am new in verilog a , and i had a problem while i was trying to simulate an ADPLL simulation with the pss analysis .as you may know the "loop filer" in adpll i implement with an integrator...
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FATAL (CMI-2010): Assertion failed in file `bypassUtils.cc'
Hello,I'm facing the following problem, when I try to run a transient simulation.FATAL (CMI-2010): Assertion failed in file `bypassUtils.cc' at line 1977.FATAL (SPECTRE-21): Assertion failed.The only...
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IBM130 Layout Basics
Hello, communityI would like to know if there's any document that concerns tips and hints on how to route RF CMOS circuits. Specifically, I'm looking for any type of document that teaches good...
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way of determining W/L ratio of a rf cmos circuit
Kindly suggest me the proper way of determining W/L ratio of any rf cmos circuit...Is there any kind of rule to determine the optimum ratio(mathematically or practically)?
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How to plot the sum/difference of S-parameters in a smith-chart?
Hi,if I run a psp-Analyses and plot "spm('psp 1 1)", this is plotted in a smith-chart. But if I plot "spm('psp 1 1)-spm('psp 2 1)-spm('psp 1 2)+spm('psp 2 2)" which is the...
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Noise Aware PLL Design Flow
Hello! Faced with problem of LPF model. At pllmmlib it looks like a cell but how can i set it's parameters? Besides it has only two ports but LPF can have three ports what should i do in this...
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ERROR (LBRCXM-644): Bad return status from RCX script generator. 0x100
Dear Friends,I would like to extract a VCO layout, but I have a problem with Assura QRC.I use: Cadence (IC6.1.5-64b.500.13), Spectre (12.1.1.164.isr15), Assura (4.1_USR1_HF13)And this is Log...
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Discrepancy in pac and psp result
I have simulated the conversion gain of a mixer matched to 50 ohm at both input and output. Theoretically, voltage gain and power gain should be equal because both input and output are matched to 50...
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how to find tox and Cox parameters for Dongbu
how to find tox and Cox parameters in dongbu
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Some Questions :
1.For transient or any other long running simulations, how to ensure that simulation results are automatically saved on disk so that in event of program crash, one can resume with simulation upon next...
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Passing string parameters into Verilog functional view
I want to pass a string parameter to a behavioural description.In Spectre Veriloga, this works fine as follows: * in the veriloga view of 'block1', I include the line: parameter string string123 =...
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How to clip the calculator dft() output ?
Hi ,I am trying to clip the calculator dft function output to extract dft peak value in that frequency range. Is it possible ? If yes , how to go ahead with this .How to get y value at a particular...
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GPDK_045 Inductor
Upon running DRC on ind_a cell, I am getting a DRC error:psubstrate_StampErrorFloatAlso, is there a way to sweep parameters like Inner Radius, Inductor Width, multiplier or Number of Turns for...
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Phase noise simulation of an XOR gate based frequency doubler
Hi ,I am trying to calculate phase noise at the output of an XOR gate. The XOR gate input are two quadrature clocks @ 500MHz and output is a 1GHz clock. I have some arbitrary noise spectral density (...
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PAC and PXF inconsistency?
Good day.I am trying to simulate power supply noise propagation through an amplifier stage. The amplifier is driven by a large signal, which is the PSS beat. The circuit is slightly non-linear (THD...
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RCX Error
Althought it seems like a licensing error, I really don't know what wxactly is the reason for that : Assura (tm) Physical Verification Version av4.1:Production:dfII6.1.3:IC6.1.3.500.10...
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