Clik here to view.
Cadence simulate ring oscillator's output in frequency domain (continuous wave)
Hi,Could anyone please help me with this question? I need to simulate my ring oscillator's output in frequency domain, showing a continuous spectrum waveform as it can be seen from spectrum analyzer...
View ArticleClik here to view.
rfLib ACPR source usage
I'm attempting to use the ACPR_source block as an input to my circuit. I have baseband I and Q files for a modulated waveform, sampled at 30.72MHz. I'm encountering a problem that I believe is due to...
View ArticleClik here to view.
Cadence Simulation Calculation Mismatch
Hii wanted to calculate the effect of load on the output of the inverter. Attached is the experiment setup. Vdd=1.1 and Vgs=0So ideally when there is no load, the output is pulled closed to 1.1....
View ArticleClik here to view.
cmos mixer
HiIn general, can we use one mixer circuit as down-conversion mixer as well as up-conversion mixer?
View ArticleClik here to view.
Phase noise simulation in ring oscillator
I have two questions regarding the phase noise simulation results (PSS + Pnoise) for ring oscillators:(1) How much the precision of the initial oscillation frequency is important in estimating phase...
View ArticleClik here to view.
Shortcut help!
I think there is a shortcut that can highlight all the same nets in the schematic window. Anyone can tell me what is that? Thanks very much.
View ArticleClik here to view.
Issue with Flicker phase noise simulaiton with PSS+Pnoise in cadence
I have a problem with Flicker phase noise of a quartz crystal oscillator (RLC equivalent cirucit + opamp current amplifier + opamp inverter) simulated with PSS + Pnoise of CADENCE:Indeed I simulate the...
View ArticleClik here to view.
Need USEFUL, PRACTICAL, and FEASIBLE procedures to design, simulate, and...
I am in need of "Useful," "Practical," and "Feasible" procedures on how to design, simulate, and layout RF Transformers using Spectre RF.I have not seen the real-world item in the "model library" of...
View ArticleClik here to view.
RF high frequency transient/harmonic simulation
I am trying to run a large signal simulation of an RF Switch after running an initial transient as the internal voltages need to be set and attain steady state before I run power through the circuit.I...
View ArticleClik here to view.
Phase noise to phase jitter for square waves
Hi,I'm simulating a free running oscillator for jitter and I have the following question:I have to run a "PNOISE - sources" simulation in order to recieve phase noise, since I have to filter the phase...
View ArticleClik here to view.
Data update issue using SpectreRF MATLAB toolbox
Hi, I am trying to do post-processing on my output signals in MATLAB using the SpectreRF toolbox. I use the cds_srr() command in MATLAB to import the signal data into MATLAB and take it from there....
View ArticleClik here to view.
Reading multi-dimensional .cti files in Virtuoso ADE
Hi,I am doing some checks with measured [S] for varactors. I have those data for defined structures from the foundry, I want to compare them with what comes out from the Spectre model of the same...
View ArticleClik here to view.
Setting Up for Substrate Coupling Analysis
Dear All,I was going through Substrate Coupling Analysis User Guide.it has been recommended as :- Note: If you want to use SCA in your RF design flow you are advised to take the CadenceSpectreRF/SCA...
View ArticleClik here to view.
Cadence QRC extraction techfile generation
Dear All,I am trying to set up Cadence QRC extraction set up. In the beginning I am going to QRC using Calibre Input. For that purpose I need to setup a QRC tech file.Steps in the QRC user guide for...
View ArticleClik here to view.
QRC Techgen simulation error
Dear All,I am trying to generate QRC techfile which has a simulation and a compilation stage .In my Techgen -simulation stage , I got following error ERROR (TECHGEN-41598): Transistor level...
View ArticleClik here to view.
Help regarding montecarlo analysis of an Inverter
Hello all, I am runing a montecarlo simulation for an inverter.I have got an expression from calculator determining the propagation delay and I have passed it on to ADEXL for montecarlo analysis .The...
View ArticleClik here to view.
Importing .cir or .lib broad band model from HFSS to Cadence
Hi I want to import a broadband spice model instead of an Spectre model for my transmission line from HFSS to Cadence. I can export in different formats, i.e. with .cir or .lib extensions.Would you...
View ArticleClik here to view.
Phase noise simulation in ring oscillator
I have two questions regarding the phase noise simulation results (PSS + Pnoise) for ring oscillators:(1) How much the precision of the initial oscillation frequency is important in estimating phase...
View ArticleClik here to view.
How to make RF type simulation faster with MULTI-COREs & MULTI-THREADS
Dear All,While PSS type simualtion of extracted netlist, it takes a lot of time ( like 12 to 14 hrs). ( IC5141,MMSIM12) Is there any ways of running things so that the simulations can exploit the...
View ArticleClik here to view.
Regarding the Transconductance in a circuit
I am trying to draw schematic diagram of equivalent circuit of Single Walled Carbon Nano tube on CADENCE-VIRTUOSO.I need to place transconductance (gm) into the circuit,but I cannot find it in any...
View Article