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THD of an RF Amplifier
Hello,I need to simulate the THD of a wideband amplifier (0-100GHz) using Cadence Virtuoso/Spectre RF.Can I just use PSS simulation for this ? I need the THD as a percentage. How would I calculate...
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Accessing Montecarlo run DATA in ADE-XL through Ocean Script.
Dear All,I have run Montecarlo (20 runs) in ADE-XL.I want to post process the transient data using OceanScript. The script will go to the result directory of each run and then will process them.Can...
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How to configure the simulation (netlist) to run multiple SP analysis by only...
Hi Guys,I have a LNA design including inductors L1, L2, L3 and MOSFETs M1, M2, and a Voltage bias, Vb1.I want to generate a very big netlist that includes 100 combinations of my device parameters, and...
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Spectre/RF Matlab Toolbox
I am running mmsim 12.11.203 and Matlab R2013a (8.1.0.604) 64-bit.When I use the function cds_srr Matlab crashes with the following message:"This error was detected while a MEX-file was running. If...
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gilbert cell mixer using tsmc 90nm
Hello, i am new at cadence virtuoso and i am trying to implement a simple gilbert cell mixer.is there some support person from cadence i can contact regarding this issue?
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How to define port in cadence which has a impedance value that is frequency...
Hi Everyone,I am trying to use a port with complex value as a output termination in SP simulation of cadence. For example output port impedance value is 1/(2*pi*freq*C) which is also frequency...
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Simulation set up for Image rejection ratio of IQ Down converter mixer
Hi There,I'm looking to simulate Image rejection ratio of down converter IQ current mode passive mixer. In "Spectre Circuit Simulator and Accelerated Parallel Simulator RF Analysis in ADEExplorer...
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N_12_LLRF (UMC90nm library) Long channel pinchoff saturation
Hello , i Have the N_12_LLRF component from UMC90nm Librarymy L=90nm what gate_finger_width to use in order to get this component to be characterised as long channel component?(so i will get a good...
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regarding PSS and PAC analysis
Hello.I'm trying to simulate an N path filter circuit.I used to deal with analog circuits and not RF ciruits, so im always used to run an AC analysis that follows a DC operating point analysis.to my...
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theory doesnt match HB simulation results of square wave
a square wave with 50% duty cycle should not have even harmonics only the odd ones. but in my simulation get all the harmonics(in violation of the theory shown in the last slide bellow)T=102 ps =>...
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HB simulation of two input signal
Hello, in the following circuit shown bellow i have two type of inputs and the output supposed to be the harmonics of a differential signal between the nodes of the capacitor as shown bellow.i tried to...
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Noise figure of differential signal
Hello, in my circuit i have input RF Vsin signal and a differential signal from both sides of the capacitors as shown bellow. The noise simulation shown bellow demands a PORT input for the NF...
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back to back square wave generation
Hello, i am trying to build a simplified model testing a simple principle described in the end.i am supposed to get a current switch from side to side , thus getting a square wave pattern.but in the...
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multiple Y-param results for varactor
Hello , i have built a varactor based on the theory shown bellow, on one hand i need to sweep control voltage on the other hand i need to have Y-param for every value of control, and convert it into...
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Simultaneous Load-pull and source-pull simulation in cadence
Hi there,Happy holidays and new year. I wonder if cadence has an option similar to ADS to simultaneously simulate source-pull and load-pull for simultaneous conjugate matching. Only simulating...
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expression problem from ac sweep
Hello, i am trying to recreate the method described in the following post for calculating the output impedance, i put AC source as shown bellow to act as a probe , i added the coil to filter undesired...
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transient output file option in pspise
I want to save my simulation result in capture every 100us and export them in text file. I went to simulation settings>Analysis>output file option and changed print values in output file every...
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Input impedance calculation using DFT for Radio Frequency
HiI am trying to find the input imepdance of an RF rectifier circuit by using FFT in cadence. The equation I'm using is Zin = DFT(Voltage)/DFT(Current) at the required...
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Pins denied when converting from circuit to component symbol
Hello ,i have tried to convert the varactor circuit into simbol and integrate it in the main circuit.when i have replace the sources and ground with input pins it gave me 4 warnings when in tried to...
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PSS simulation for VCO
Hello , i have found that my VCO oscilates 13.45GHZ by converting period to frequency from the transient plot bellow f=1/T,i tried to perform the PSS and PNOISE as following:PSS: tbstat=30.48nsecnsec...
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