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SNM calculation for SRAM
Hey, I am currently working on SRAM cell. I need to calculate the SNM-read, write and idle for my cell. I have the understanding of what is SNM. But i am not sure on how to plot the butterfly curve...
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Eye diagram
hiI have been trying to plot eye diagrams in cadence. The command eyediagram(signal,start,stop,period) is the format. But i am not able to control the no of eyes in my diagram. Say i run my simulation...
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*WARNING* QRC_HOME environmental variable is set but UI can't locate correct...
Hello,I get the following warning with QRC: *WARNING* QRC_HOME environmental variable is set but UI can't locate correct QRC installation. In order to run UI in QRC compatibility mode you...
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reading simulation results from cadence to matlab/ cds_innersrr
HiI build a small low pass filter and ran the simulation in ADE and tried to read using MATLAB Spectre Toolbox. Its not working.The error is attached as follows. I have referred to Matlabspectre.pdf...
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Ocean script for printing S11 in dB into .csv file in scientific format
Dear all,I am trying to print the .sp analysis ( S11) in dB format into a .csv file in scientific format.The code is as below.S11=sp(1 1)S11=20*log10(sp(1 1))s11_db20=S11plot(s11_db20)ocnPrint(?output...
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Ocean script is NOT writing into the file in the first run
Dear all,I have written a code which actually does SP analysis and also DC analysis for each corner.I am writing the S21 wave using ocnPrint( ) for each corner into separate file.I am also writing two...
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RFLib Mixer Verilog-A model IIP3 simulation Issues
Hi,I was simulating the Mixer model in Verilog-a given in rfLib.It is terminated with ports of 50 ohm at its input and output.I did PSS and PAC simulation to find the IIP3 of the Mixer. I used Mixer...
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Hai, How to edit the isolation which is inside any shapes.
Dear all, While doing copper filling, if we get small isolation in the copper filling area depends on pth components or etc.I not able to edit these isolation areas.So please help me. Thanks in...
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Question about frequency setting with ladder network in QRC
Hi,I am using the technology of IBM_7RF on IC614. The "ladder network" in QRC models skin effect of a wire at given frequency. From the extraction model I do find paralleled L and R. However, these...
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QRC on IC6.15
Hello,I'm using QRC on IC6.15.Sometimes, when I try tu run QRC SND Analysis I get the following error:*Error* getSGq: destroyed window: - window(invalid):577896832(destroyed)Is there a way to correct...
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What parameters are changed when running Monte Carlo Analysis using "random...
Hello, everyone, I am newbie to do Monte Carlo Analysis. When I " run Monte Carlo Analysis" a window came out, it said that two sampling methods could be selected, Random or latin Hypercube. I...
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What is the use of No of harmonics option in PSS form
Hi,In PSS form, there is one option called Number of harmonics. I am NOT able to understand what is its use as PSS is any way a Steady state DC operating point analysis ?Of course, No of harmonics...
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How to print two PNOISE outputs into files using OCEAN script
Dear All,I have to print the Two PNOISE Outputs ( You may see the Pnoise analysis command below in the code) into a file using ocean script.But the below script is not able to write into the file. It...
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Ron of nmos in Cadence for deep triode region of operation
Hey,Can anyone help me with plotting the on resistance of nmos transistor in Cadence when we do dc analysis. I am trying to understand how ron changes with Vgs voltage. How do we do this plot. Any help...
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Executing multiple statements inside if-else command in OCEAN
Dear All,I need to implement something like below:-Is it possible to do so in OCEAN ? if( statement is true) Execute---statement-1 Execute---statement-2 Execute---statement-3 else...
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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....
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Frequency Value at S21 peak value
Hi, I would like a calculator expression which produces the x value (frequency) for the ymax of S21 ymax(db(spm('sp 2 1))). What is the way to produce this result? Thanks.
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VCO transient analysis : Convergence Issues.
Hi, I am facing convergence issues while doing transient analysis on a LC MOS cross-coupled oscillator.Figure of the NMOS-only cross-coupled oscillator is attached along. Spectre Version :...
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Polar plots in VIVA
In Cadence 6.1.5(.500.7) I can't find ways to plot in polar format the complex ac gain of circuits (and spars, and stb, ...). This was available in AWD in Cadence 5.1. In VIVA XL I can go to Graph >...
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Addition of Noise file to input voltage source of Cadence Spetcre
Hi., I am facing problem in adding noise in transient analysis in cadence spectre .Can help me how to add noise as input source for transient analysis using simulator cadence spectre .
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