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Usually when op-amps are internally compensated for bias currents their residual bias currents aren't equal and, in fact, they can be opposite in polarity because of slight mis-matches in the transistors or current sources. When this is the case I don't think you EVER want to have the equivalent...
I see many experienced analog designers that impedance match the non-inverting and the inverting pins when an op-amp is internally compensated. Do most of you guys do this too? If not, what are Rules of Thumb for handling op-amps that compensate bias currents internally?
Re: parallel RC filter
I believe I see what you are saying. Considering Rout it really isn't a parallel RC filter? How much, in general, should I expect Rout to vary? And no accuracy isn't all that important.
I'm analyzing a circuit with a comparator that has a parallel RC filter on its output then into a cmos logic gate. I understand the point of the Parallel RC filter from a current-source perspective, but I'm not sure I do in this case. Can anyone enlighten me?
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