aaron_do
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Hi all,
I'm looking to design a closed loop differential-in, single-ended out unity gain amplifier. It needs to have very good CMRR. One way to design such a circuit is to use an instrumentation amplifier. However, an instrumentation amplifier drives resistive loads in the first stage, making it a little power hungry. I found such a circuit can also be designed using a differential difference amplifier with feedback.
Does anybody have any experience with this circuit? How does it compare to a normal op-amp in unity-gain feedback in terms of accuracy. Alternatively, does anybody know of other good options?
Any feedback is appreciated.
thanks, Aaron
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