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Plot the CV curve using the spectre (Read 5672 times)
kim57
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Plot the CV curve using the spectre
Feb 01st, 2007, 5:19am
 
hi all,

I use the spectre to simulate some capacitor, i need to plot the capacitance vs the supply voltage.
it's there anywhere for me to do so?? please help me if anyone know how to do that..
thanks
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Geoffrey_Coram
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Re: Plot the CV curve using the spectre
Reply #1 - Feb 2nd, 2007, 5:29am
 
Spectre allows you to do an ac sweep at a fixed frequency; do
 spectre -h ac
and look at the "freq" parameter.  Set it to 1/(2*pi) and put a voltage source with ac magnitude 1 on the capacitor.  The imaginary part of the current is now exactly equal to the capacitance.
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aaron_do
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Re: Plot the CV curve using the spectre
Reply #2 - Feb 7th, 2007, 11:14pm
 
is there an easy way to plot just the current through Cgd, Cgs...etc

thanks,
aaron
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