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Simulators >> RF Simulators >> Double exponential current source
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Message started by Annie on Sep 29^th, 2012, 4:27am

Title: Double exponential current source
Post by Annie on Sep 29^th, 2012, 4:27am

Is there any way to provide a double exponential current source in CADENCE IC5.1.4.1? I want to test the SEU tolerance by injecting current spike,no TCAD simulator available...any help?

Title: Re: Double exponential current source
Post by rfidea on Sep 29^th, 2012, 4:59am

Do you want to to something like i = exp(exp(K*time)) ?

I think there is a "exp()" block in the ahdlLib. If you create a voltage slope, v = K*time with the vpulse from analogLib and then drive two series connected exp blocks from ahdlLib it will do the trick.

Title: Re: Double exponential current source
Post by Annie on Sep 30^th, 2012, 2:17am

Actually, I meant something like a spike with different rise and fall time like
I(t)=A/(Tf-Tr){exp(-t/Tf)-exp(-t/Tr)}.
Is it possible to do with Iexp in AnalogLib?

Title: Re: Double exponential current source
Post by boe on Oct 2^nd, 2012, 12:13am

Annie,
did you try it?

- B O E