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S parameter plot
HiI am a newbie. I want to plot S parameters in Cadence 6.1 . I have been trying hard but in vain. The problem is the port selection menu is not accepting any inputs from teh schematic. so it remains...
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noise model issue
Hello, Would someone please explain to me this issue when I use different versions of the spectre APS simulator? I was using the pnoise analysis on circuit that contains hicum (bht) model, by MMSIM...
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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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modelling reflection in Cadence Virtuoso
Hello Sir,I have been trying to design a UHF passive RFID tag in 130nm on Cadence Virtuoso IC 5.4.1. As for the design of a matching network between Antenna and Rectifier of RFID please tell me how...
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ERROR DURING SIMULATION
Sir,First of all, let me thank u for helping me in my project work, by giving valuble information. We are using BSIM-CMG (DG-MOSFET) model for circuit analyses and earlier, we were getting the output...
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Sweep of a design variable in ADE-XL with multi-test simulation
Hello,I have an ADEXL state with two tests. I need to run different sweeps on the same variables.Is there an option to sweep design variable (instead of global variable)?How can I do that? Thanks in...
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how to separate a noise contributor in pnoise analysis?
HI folks, My question is:in pnoise simulation, can I activate/deactivate specific voltage sources or instances as only noise contributor? For example, in transient noise analysis, Virtuoso provdes a...
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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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Error Vector Magnitude (EVM) simulation problem in IC615
Hello, cadence community,I've stumbled upon a problem with power amplifier EVM evaluation - EVM is out of adequate bounds. At first I thought that the PA is faulty, but then I decided to create a...
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Issue with Envelope analysis
Hi,I am simulating the I/Q upconversion using port through envelope analysis.The I input pwl file has samples of a cosine of frequency=5MHz and timestep=0.00125us.The Q input pwl file has samples of...
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Transient results as starting point in PSS
Hello,Could we use the transient analysis results as a stabilization point (tstab) for PSS analysis? If so, how could we acheive it? Is there any documentation on this? Any inputs will be helpful....
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receiver front end simulation
I have designed the Diffrential LNA and Gilbert Mixer in cadence and done all simulations individually and I got the results also. Now I had combined them and I want to do compleet simulation. So which...
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Is the issue of "positive phase noise" related to MMSIM version?
Hi, I am simulating PSS+Pnoise on my LC oscillator for jc and jcc jitter measurement. From the phase noise plot I got positive value at low frequency offset, which I think makes the jitter calculation...
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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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Problem in plotting Cgs vs Vgs
Hi.I need to plot Cgs vs Vgs of a NMOS transistor. I have searched a lot and followed tutorial but still in vain. Below is my circuit for simulation. My schematic and setting is attached in the picture...
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Cgs and Cgs vs Vgs
Hi.I set up this circuit for simulation Cgs and Cgs as Vgs changes. Below are the curves Cgs and Cgs vs Vgs.(please see it in the second post. The forum doesn't allow to post two images in a single...
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How to read exactly the value of impedance from the plotting of Gmin vs...
Hi.I am plotting Gmin ( optimum noise reflection coefficient) of a LNA in Smith chart. I swept Gmin versus frequency (for example, ranging from 1GHz to 3GHz).Is there a way to read out optimum noise...
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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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Monte carlo analysis
sir i am ,, using IC 5.10.40 in cadence , ,, I want to make monte carlo analysis for my circuit , but my seniors here are telling that monte carlo is not working here in the version ,, how can i check...
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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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