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LL

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help on repeating simple t/h example in SpectreRF
Jun 28^th, 2006, 12:31am

Hi -
I'm new to spectreRF and find the article "Simulating Switched-Capacitor Filters with SpectreRF" (under Anaysis/Analog SImulation) extremely informative. However, I'm having a difficult time repeating the figures for just a simple t/h simulation. If you were able to repeat that successfuly, I would be very much interested to know how you did it. Perhaps, Ken can also provide some hints on how you generated those plots for the article.

thanks,
LL

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Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: help on repeating simple t/h example in Spectr Reply #1 - Jul 20^th, 2006, 9:36am Perhaps you can be more specific? For example, which figures are you trying to recreate? Have you tried downloading the netlists and starting from there? -Ken
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LL

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California

Re: help on repeating simple t/h example in Spectr
Reply #2 - Jul 26^th, 2006, 11:05pm

Hi Ken,
Thank yuo for your reply. Yes I did download the netlist but still wasn't able to repeat the plots in the doc. BTW, the netlist as is doesn't run. I made some mod before I was able to get the sim to run.

I see that dwingram is asking the same thing I after. Your reply to his post will defintely clear up my inquiry as well.

I will wait for your reply. Many thanks in advance.

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Andrew Beckett Senior Fellow Offline Life, don't talk to me about Life... Posts: 1742 Bracknell, UK	Re: help on repeating simple t/h example in Spectr Reply #3 - Jul 27^th, 2006, 10:05pm Really? Did you supply the -E argument to spectre (it gives you an error if you don't, since this example uses cpp directives). I just re-tried both netlists, and can run with: Code: spectre -E tah.ckt spectre -E scf.ckt Regards, Andrew.
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LL Junior Member Offline Posts: 18 California	Re: help on repeating simple t/h example in Spectr Reply #4 - Jul 27^th, 2006, 11:54pm HI Andrew, Thank you for your reply. Yes, the -E corrected the error. Does your pxf result look close to fig 8 in the doc?
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Ken Kundert Global Moderator Offline Posts: 2386 Silicon Valley	Re: help on repeating simple t/h example in Spectr Reply #5 - Jul 28^th, 2006, 4:48pm There was an error in the paper. To get the results shown in Fig 8, the PXF analysis must use the node 'sout' rather than the node 'out'. I have updated the paper and the netlists. -Ken
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LL Junior Member Offline Posts: 18 California	Re: help on repeating simple t/h example in Spectr Reply #6 - Jul 29^th, 2006, 10:32am Thank you very much Ken (and Andrew as well) for your help.
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