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pxf or pxf modulated in simulating VCO PSRR?
HiI am trying to simulate a VCO's PSRR.I used two methods to get the result.The first one is to run the pxf analysis and choose the VCO output nodes as output.Here is my setting:The second one is to...
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Inductor value and its Q factor
How can I measure value of an inductor and its Q value from its layout in virtuoso. And how will that inductor be calculated ? will it be using some EM solver ? or will it be a parasitic extraction?
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Hidden States and SpectreRF: Is there a safe way to read DC values from file?
Beating my head with this problem for some time now. Any help would be appreciated.In our top-level test bench we have 84 8-bit registers that we need to set to get the whole thing to start up in a...
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GCF in the PSS settings
Hello,I'm setting a PSS simulation for my DDS.The produced frequency is fCK/(2^N)*step, where step is a parameter that I control from the ADE, and N=10.I would like to set the beat frequency of the PSS...
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PSS and HB find wrong frequency as first harmonic
Hi,I use PSS and HB to simulate a LCVCO ( initial condition applied from convergence aid):from result--direct plot form: 1st harmonic is 2.36G:However, 2nd harmonic have the highest amplitude:may I...
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Phase Noise simulation with HB and PSS
Hello,As I simulate the phase noise using the periodic steady state and the harmonic balance tools on spectre, the trend of phase noise and the values change meaningfully, e.g., more than 6 dB at the...
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How to use S-paramter file of the Designed Inductor in PSS simulation
Dear All,We have designed an Inductor-Transformer. We have extracted the S-parameter files from 200MHz to 300GHz from electromagnetic Simulator.Since the Inductor-Transformer is very complex it is very...
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How to disable the thermal noise but not flicker noise in SpectreRF
Dear all,Is there any way to disable the thermal noise but not flicker noise in SpectreRF ?
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How to find the higher order derivative terms (gm2,gm3,go2,..) and...
Dear All,I want to find the non-linear harmonic terms of a MOS tarnsistor.To this end I wan to find the derivative term gm2=d^2i_ds/dv_gs^2, gm3=d^3i_ds/dv_gs^3...Also I need to find the...
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(Understanding) Problem: Load-Pull in Cadence/Virtuoso
Hi, if I understand this right, then Load-Pull means, that a load with a tunable impedance is connected to the output of a circuit (for example an amplifier). Then this impedance is varied and the...
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Is it possible to disable Intrinsic Charge Capacitance in BSIM3v3
Dear All,I need to disable the MOS (BSIM3v3 version 3.24 capmod=3) parasitic capacitance. For that I need to modify some parameters in the model file of the MOS.To me it looks like, disabling...
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monte carlo simulation problem in cadence adexl
Hi, I'm running a monte carlo analysis in cadence IC614 with tsmc180 tech file.I want to evaluate the response of circuit to variation in mismatch between two rphpoly resistor and I used the...
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Using "winding" in analogLib as a transformer
Dear All,I want to use a transformer with turn ratio and different dot positions the primary and secondary. xfmr in analoglib doesn't allow this.I am thinking to use "winding" in analogLib. First...
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Why PSS gives OScillation to Free Running VCO without any initial condition...
Dear All,I simulated a LC oscillator in PSS in Oscillator mode even if I have not given any initial condition (Convergence Aid).While if I run the same oscillator in TRAN without any initial condition...
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Issue with Plot of Fmax of MOS Transistor
Hello There,I am trying to simulate Fmax of MOS transistor. for this I am following Art's guideline - from post "Measuring Transistor fmax"When I plot Gumx from ADE direct plot. I see kind of weird...
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PAE Contour
Hi,I am trying to design CMOS PA at mm-wave frequency by Cadence. I already set up the simulation to draw Pout contours by Load pull method. Now, my question is that if Cadence has this ability to draw...
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VCO jitter simulation noise type and where to choose the osc_version and...
Hello all,I am trying to simulate the jitter of a VCO. I tried to use "noise type" as "jitter-FM", or "modulated", and it doesn't work. Here is the error:ERROR (SPCRTRF-15405):...
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sweeping nport file name with ADEXL
Hi, I saw a thread on that before but the answers were not very clear. I want to sweep the filename of a nport cell. lets say the filename is called sp1.s2p. now i have 100 different files sp1.s2p...
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FM Demodulator, veriloga model simulation.
Hi,I was trying to use the FM demodulate block from ahdlLib library which is integrated in the software. However after setting the parameters and running the simulation I get the following error:Error...
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S-parameters from a RF Circuit
Hello everyone.I am trying to simulate, for my undergraduate thesis, a new RF circulator that was published by Nature Physics on article called "Magnetic-free non-reciprocity and isolation based on...
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