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From: James Meyer
Subject: Re: CMMR op amp outside voltage rails ?
X-Newsreader: Forte Agent 1.92/32.572
Date: Thu, 05 Dec 2002 20:20:29 GMT
NNTP-Posting-Date: Thu, 05 Dec 2002 15:20:29 EST
On Thu, 5 Dec 2002 19:14:53 -0000, "John Jardine"
>Sorry-- I've no ideas, but I was just for interest wondering how you've
>arranged that 1st op-amp?.
>(As I read it). If you've got a 0V and +5V supply for the 3 op-amps they can
>be asked to work at bottom end with (say) a -5V signal and a -4.99V signal.
>How are you removing the negative common mode offset voltage if the amps are
>run from 0-5V?. (I'm assuming all the voltages are not isolated from each
Norton op-amps have characteristics that allow operation of complete
amplifiers with common-mode input voltages of either polarity way beyond the
rail voltages. That's because their inputs stages are differential *current*
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