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From: Chuck Simmons
Organization: You jest.
X-Mailer: Mozilla 4.61 [en] (X11; U; Linux 2.0.33 i586)
Subject: Re: OP Amp Output Resistance
Date: Sun, 22 Sep 2002 05:02:40 GMT
NNTP-Posting-Date: Sat, 21 Sep 2002 22:02:40 PDT
> All op amps have a non zero output resistance that is not noticable due
> to feedback unless varying current demand exceeds the bandwidth of the
> amplifer. I need to know how linear this resistance is.
Not very linear at all. You are talking about the power bandwidth and
that depends on the output structure of the opamp. Generally, opamps
become highly nonlinear in that regime and the output may even be
asymmetric for a symmetric input.
> I also would like to know if the output resistance is not specified, if
> it can be deduced by how output voltage swing specification varies with
> output current.
No. Not unless the specification is determined open loop with low output
... The times have been,
That, when the brains were out,
the man would die. ... Macbeth
Chuck Simmons firstname.lastname@example.org
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