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shyboy
Joined: 05 Jan 2005
Posts: 12
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 05 Jan 2005 9:25 Need help on switched capacitor filter simulation |
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Hi, all,
I am running a simulation on a switched capacitor lowpass filter using Spectre...The analyses i am running are PSS followed by a PAC. And the input signal is a dc source with a dc level of 1V and PAC of 1V...The problem is that, i observe almost no signal at the filter output...
I guess i probably did not give the correct input signal...Can anyone tell me if the input signal setting is correct or not? if not, what kind of input signal shall i use to test my SC filter?
Any instruction will be appreciated...
shyboy
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terryssw
Joined: 18 Apr 2004
Posts: 176
Helped: 14
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| 06 Jan 2005 16:02 Re: Need help on switched capacitor filter simulation |
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| Can you post more specific problem description? Probably you have not set the PSS and PAC setting correctly.
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chinito
Joined: 05 Jul 2004
Posts: 133
Helped: 4
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| 06 Jan 2005 23:35 Re: Need help on switched capacitor filter simulation |
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| I suggest you read P ellen's book and/or notes from his website w3.aicdesign.org. He gives excellent PSpice examples on SC filters and their simulations.
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borodenkov
Joined: 02 Mar 2004
Posts: 129
Helped: 11
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| 07 Jan 2005 1:47 Need help on switched capacitor filter simulation |
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If you're using SpectreRF (PSS, PAC, PNoise) - read Ken Kundert's article about SC filter simulation at www.designers-guide.com
There's a perfect explanaition how it works with examples (even examples' netlitst are provided)
P.S. it's hard to help you without seeing your netlist.. hope Kundert's paper will help you.
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