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PSS problem in VCO design
Hello all,I am trying to design VCO with feedback topology (common source amplifier + pi-feedback) i.e Hartley oscillator with active inductors. First I designed a circuit with all passive components...
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Phase Noise Simulations of Frequency Multipliers Using Jitter/Timedomain Noise
Hello All,I have simulated the phase noise of frequency dividers in the past numerous times using the method defined in Chapter 6 of "Predicting the Phase Noise and Jitter of PLL-Based Frequency...
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plot operating region as a function of bias voltage
Hi again.I am trying to plot the operating region of a MOSFET as AFUNCTION of bias voltage. Is there a way to do that?Thanks.
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Insufficient memory to run PSS analysis - how to resolve?
Hello.I did see that there are three recent threads with very similar titles, but - unfortunately, with completely different problems described. I use up-to-date MMSIM and IC5 (2012_2013 package...
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HBAC analysis issue, while simulating a mixer from Cadence examples
Hello, I am having two errors in setting up the HBAC analysis. I am trying to run simulations described in Cadence examples/RFworkshop/docs for a mixer.HB analysis runs smoothly, but when I try to run...
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Complex-constant multiplier in VerilogA
Dear All,I am doing a PSS+PNOISE simulation of a circuit in Spectre. I need to multiply the output voltage of certain terminals with Complex Constant ( exp(j*pi/4)=0.707+0.707i).This I don't want for...
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OpAmp Simulation in Cadence Spectre
Hi, I have used OpAmp symbol from Solutions library (default library of cadence). As an initial step, I have simulated a basic circuit in Op Amp. But I am not getting the desired output. Moreover, I...
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Assura Lvs Error
I'm doing Assura LVS using TSMC 65nm technology but the cadence exit with this error. I don't know a reason for this error. Operating Mode: Legacy Mode is OffStarting dfIIToVdb...@(#)$CDS:...
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n1port
Hi, can some please help me understand why my n1port properties box (pic below) doesn't look like the one in the link below? http://uuu.enseirb.fr/~bedenes/cadence/Sparametre.html As you can see it's...
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Plot issues in IC 615
I have upgraded to IC 615 from IC 613. But I am facing problems:1. In spectre RF when I do s parameter simulation and try to plot gain circles (Ga,Gp etc) I get nothing. Noise circles work well. I can...
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Help me with the tool to do corner analysis ...
using IC 5.10.40 in cadence ,, i want to do corner analysis , i studied some manuals related to this ,, but i didn't understood how to add the process corners to my simulation ,, in this window " Add...
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how cadence do to calculate Z11 in a psp analysis
hi, i'm simuliting a circuit, where i connect 4 switching caps to the port, than i run a psp annalysis to get the input impedance"Z11", and i want to know how spectre do to give such result, it's for...
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[Help] About the simulation of Wien-bridge OSC.
The Wien-bridge OSC is as below.R=1K Ohms, C=1uF, so f=1/(2*pi*R*C)=159Hz. And the BW of the operational amplifier is 9KHz. Theoretically, the OSC outputs a sine wave.However, the OSC keeps a common...
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ERROR (SPECTRE-4080): There are no components in the circuit.
Dear Friends,I use Cadence Virtuoso version 6.1.5 with Spectre MMSIM 071.I tried to simulate a simple circuit by it. But I have faced this problem:Loading...
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PSS simulation for RF LO and mixer simultaneously
Dear Team, I am designed RF receiver in cadence. I have simulated oscillator and mixer individual. Now i am trying to simulate simultaneously. But PSS analysis is not running. Because beat frequencies...
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Double Exponential Current Pulse In Virtuoso
Sir,Is it possible to model a double exponential current pulse ( used for representing Single Event Itransients) in Cadence Virtuoso?. It would be helpful if you could explain the method for getting...
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Exporting s2p file from spetre
Hi,I am using IC 6.1.6 and I want to export .s2p file after s parameter simulation. I tried using sparameter analysis window>options>output parameters >filename.s2p>dtft=touchstoneBut no...
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How to calculate the capacitance of a Varactor?
Two different methods give me different curves (Cap. vs DC bias voltage). However, initial value, final value and also the capacitance at zero bias voltage for both methods are the same.I use ADE L to...
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plot operating region as a function of bias voltage
Hi again.I am trying to plot the operating region of a MOSFET as AFUNCTION of bias voltage. Is there a way to do that?Thanks.
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spectre , multiple model files and mixed section names
Hi there,We have a case where we have to use multiple model files in spectre simulation.I want to avoid situation where by mistake different section names are used in the simulation.E.g. ...include...
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