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mcjackson_hxw
Joined: 29 Dec 2004
Posts: 4
Location: PRC China
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 30 Dec 2004 14:44 How to simulate fully differential amp using SC CMFB? |
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Should I use pss and pxf in spectre?
Or just use ac and dc simulation to find the gain and phase margin?
Could someone give me some help?
Besides that, I can't measure the ocmr and icmr of the fully differential amplifier
Thanks in advance.
jack[/b]
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nxing
Joined: 10 May 2004
Posts: 446
Helped: 12
Location: China
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| 30 Dec 2004 15:37 How to simulate fully differential amp using SC CMFB? |
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| Use PSS simulation!
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borodenkov
Joined: 02 Mar 2004
Posts: 129
Helped: 11
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| 31 Dec 2004 0:40 How to simulate fully differential amp using SC CMFB? |
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Use PSS & PAC simulation. You can use PNoise for noise analyses.
Refer to Ken Kundert's article about the simulation of SC-filters at www.designers-guide.com/Analysis
I did not understand why you can't get input and output common mode range.
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mcjackson_hxw
Joined: 29 Dec 2004
Posts: 4
Location: PRC China
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| 31 Dec 2004 14:32 Re: How to simulate fully differential amp using SC CMFB? |
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So I should learn PSS & PAC first.
: (
If anyone have some step-by-step files. Could you mail to me?
My E-mail is mcjackson(at)163.com
Thanks a lot!
jack
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opamp741
Joined: 17 Jun 2004
Posts: 145
Helped: 10
Location: India
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| 01 Jan 2005 9:26 Re: How to simulate fully differential amp using SC CMFB? |
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| dude y dont u make a behavioral model (using V and VCVS components) of ur CMFB ckt and do an ac/dc analysis of opamp with that..it will alow u to simulate and verify ur OCMR and ICMR stuff..
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