I understand that some normal op-amps could exhibit a corner frequency of
10Hz or lower. The 741 was supposed to be 10Hz, though I never checked in
data. That roll-off would only be seen if the amp was operated open loop. I
guess that means I can't amplify 10uV to 1V in one stage.

I haven't got the hang of gain-bandwidth-product yet, current mode seems to
have changed all the rules too.

On the subject of op-amps does anyone know a unity gain stable power op-amp?

Oliver.

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