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- From: dino@inqmind.bison.mb.ca (Tony stewart)
- Newsgroups: sci.electronics
- Subject: Re: calculating bandwidth for op amps
- Message-ID: <e789TB1w165w@inqmind.bison.mb.ca>
- Date: Sat, 14 Nov 92 18:21:25 CST
- References: <1e0p15INNf3n@usenet.INS.CWRU.Edu>
- Organization: The Inquiring Mind BBS 1 204 488-1607
- Lines: 18
-
- ah335@cleveland.Freenet.Edu (Richard Banks) writes:
- > I need some general formulas for calculating the overall signal
- > bandwidth of chained op amps.
- >
- > The only formula I have now is:
- >
- > 'f_A = f_t/(1 + R_2/R_1)
- >
- > Does anyone have anything simpler than this?
- > Thanks.
-
- yes... BW = BW(open loop)/Gain(closed loop)
- since each opamp will give a 1st order response, and each stage is
- independent, overall response i easy to figure out.
- ie if all the same then the BW is same but higher order rolloff.
-
- dino@inqmind.bison.mb.ca
- The Inquiring Mind BBS, Winnipeg, Manitoba 204 488-1607
-