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ISF Function Calculation for LC VCO using OCEAN Script
Hi,I'm new to OCEAN scripting.I want to calculate ISF function for perticular noise current source. All I need to do is to inject current impulse at different time in a period of steady state and...
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how to plot capacitance vs voltage in cadence virtuoso
hai,i am designing VCO in cadence-virtuoso ADE L(180nm) topology is attached below where i have to know how to plot graph C Vs Voltage. Capacitance is parallel combination of two PMOS varactors (PM2...
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Problem in opening Cadence frm terminal
Hi...; By opening cadence icfb & , It could not be opened and getting error message like below[mudassar@vlsi58 ~]$ csh [mudassar@vlsi58 ~]$ source cadence.cshrc [mudassar@vlsi58 ~]$ icfb...
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Plotting CMRR and PSRR in cadence virtuoso
Hi, I am designing an Instrumentation amplifier using differential difference amplifier. I want to calculate CMRR and PSRR.Please help me how to plot them using cadence virtuoso.
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ac power calculation for rectifier in cadence ADE
Hi, I am designing a rectifier and need to calculate the efficiency.I have followed the below procedure:1. Designed a rectifier using MOSes with RF signal at 865MHz with a load current of 4uA.2....
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How to measure AC differential output results using calculator?
Hi, I have some problem with AC analysis:.................................................. .................................................. .........Run an AC–analysis to simulate the gain of a...
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How can the calculator find a "x" according to a "y"?
Hi,Simulation waveform is as follows.In the output, I want to find the xvalue when yvalue=0.5. As is known, this can be done very easily in wavescan. If we want to print the xvalue directly after...
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How to simulate the stability of a fully differential amplifier using the...
The schematic is as follows. It is very useful tool used to simulate amplifiers' stability. Well, when simulating a fully differential amplifier, how to use the iprobe?Thanks in advance.
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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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Inductor Layout
Hi guysRecently, I'm drawing the inductor in the layout. My procedure to do this is, first drawing a ring, second convert it to polygon. But I find it is not very convenient since after you convert the...
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Parameter empty when using cds_srr function
Hi, I have a problem in reading the simulation results using Matlab. The problem is that when I am trying to read multiple parameters, the first one i read it correct but after that all parameters...
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pnoise spurs at multiples of clock frequency.
Hi, I have a simple inverter driven by a square wave, and ran pnoise on the circuit.There is flicker and thermal noise and after that has huge spurs ( about +20dBc ) at 2*Ffref , 5*Fref.And this goes...
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Threshold voltage calculation
Sir, can you specify the steps required for calculating the exact threshold voltage of an NMOS device?
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cadence problem : IP3 and IM3 with PWL
Hello All/Cadence Support, I am having the problem figuring out how to run IM3 and IP3 simulation if the input file is a pwl file. I am easily able to run all other analysis of PSS except...
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Monte Carlo Problem with Swept PSS and PAC
I am following the example in SpectreRF manual to simulate IP3 using swept PSS and PAC combination. I added output-referred IP3 as an output, using the Direct Plot form. When I run a nominal...
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clarification on SOI FinFET
hello everyone,i have doubt on SOI FinFET that can we use the same cuurent and transconductance equations of MOSFET for FinFET if not can any one help in providing the equations thanks in advance
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memory error
Recently my design goes into the last stage. The simulation was very slow (lasting several days). Moreover, my simulation software crashed several times. I got the error messages below. (1). Unable to...
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Warnings during the use of Spectre
Hi~ I am kinda a newbie to Cadence. Don't laugh at me if my questions are stupid :)I am using version 5.1.0, and IBM design kits.Some warnings come up when I start up cadence. 1. Startup:*WARNING* No...
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Export CSV data
I'm running an hb power sweep simulation using virtuoso 5.1. I have some graphs which I created using Results-->Direct Plot-->Main Form. Is there a simple way to save the graphical data as a...
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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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