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shenzhen china

need help for pss and pac simulation in spectreRF
Jan 26^th, 2007, 4:54am

hello, i want to do a ac analysis with a sc cmfb opamp, but i donot understand pss and pac simulation very well.
if there is anyone is skillful with pss and pac, hope can direct me finish the simulation, thanks.
1.what parameters should i must set in the pss simulation ?
2.how to arrange the order of the pss and pac, i heard that pss must be done first with input equal to zero?
3.if the pss and pac are sperated to do in two times, then what temp data should save from the pss simulation, and how to call the data when the pac is undergoing?

i am a greener of spectre, maybe my question is at low level, hope some can do me a favor, tkanks a lot!

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Andrew Beckett

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Re: need help for pss and pac simulation in spectr
Reply #1 - Jan 26^th, 2007, 6:23am

If you are a "greener" (whatever that means) then I suggest you spend a little time looking around this site, and using the search facilities.

If you had, you might have uncovered the analysis link at the top of the page http://www.designers-guide.org/Analysis/ which has a paper all about analysing Switch Capacitor circuits with SpectreRF. Try reading that, and also searching the forum for relevant postings.

Regards,

Andrew.

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beargebinjie New Member Offline Posts: 6 shenzhen china	Re: need help for pss and pac simulation in spectr Reply #2 - Jan 27^th, 2007, 5:07am thanks for your reply, andrew. i have read that paper already, but i never used spectreRF before, so i can not understand it very well, now i need a step by step direction first, thanks!
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Andrew Beckett

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Re: need help for pss and pac simulation in spectr
Reply #3 - Jan 28^th, 2007, 2:16pm

Try reading the Cadence documentation, and also run through the RF workshop in <mmsimInstDir>/tools/spectre/examples/SpectreRF_workshop . In that directory there is a gzipped tar file, which then has PDF files with workshop examples. None of these are for Switch Capacitor circuits, but still it's a good way to get to grips with the simulator.

There are plenty of resources out there to get you started.

Andrew.

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beargebinjie New Member Offline Posts: 6 shenzhen china	Re: need help for pss and pac simulation in spectr Reply #4 - Jan 29^th, 2007, 2:35am thanks for your warmheart, andrew! :) and now i've been on my way.
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