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How to generayte uramp usingSpectreRF?? (Read 2436 times)

fchirouf Junior Member Offline Posts: 15	How to generayte uramp usingSpectreRF?? Feb 02^nd, 2005, 1:31am Hello all! I need to use uramp function in spectreRF, so I don't know who to generate it. So, as well know that uramp is a specifique function to SPICE (berkeley). Can any body tel me how to generate this function by SpectreRF. Advance thinks
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Re: How to generayte uramp usingSpectreRF??
Reply #1 - Feb 2^nd, 2005, 10:02am

I did some searching on google, having never come across uramp before. As far as I can see from http://www.beigebag.com/case_logical_3.htm it is simply:

uramp(f(a)) == f(a) if f(a)>0, else 0.

http://www.anasoft.co.uk/Spice3F5Manual.html says the same thing.

So in spectre, that would be:

Code:

// model of what I think uramp does
//

v1 (1 0) vsource type=sine freq=1M ampl=1
v2 (2 0) bsource v=v(1)>0?v(1):0

tran tran stop=5u maxstep=10n

Regards,

Andrew.

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