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Analysis of differential amplifier circuit.

Hardware design
December 09, 2020 by Simone 1252

As shown below:

What is the function of capacitor C1 and capacitor C2 in the circuit?

What role does capacitor C1 have besides differential mode filtering?

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Nico Posted on December 9, 2020

Provide a loop for the input current because the input impedance of the op amp is very large.

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  • Simone

    Simone Posted on December 9, 2020

    The function of capacitor C1 is to provide a loop of input current? ? Is it an AC signal?

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Frances Posted on December 9, 2020

It should all be to filter out some noise or ripple.

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Catalina Posted on December 9, 2020

They are all filtering effects. The value of C1 should be small. The circuit I have seen takes pF and is close to the pin. The value of C2 depends on the filtering effect!

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