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Plot the CV curve using the spectre (Read 6896 times)
kim57
New Member
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Posts: 6
Plot the CV curve using the spectre
Feb 01
st
, 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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Posts: 1998
Massachusetts, USA
Re: Plot the CV curve using the spectre
Reply #1 -
Feb 2
nd
, 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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Posts: 1398
Re: Plot the CV curve using the spectre
Reply #2 -
Feb 7
th
, 2007, 11:14pm
is there an easy way to plot just the current through Cgd, Cgs...etc
thanks,
aaron
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