Question
Asked Nov 8, 2019
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Define and explain CMRR of an operational amplifier. 

 

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Expert Answer

Step 1

An operational amplifier (op-amp) has two input terminals: the inverting and the non-inverting terminal. The output voltage of an op-amp can be expressed in the following way:

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Step 2

Operational amplifier is a differential amplifier meaning that, it amplifies the differential input. The differential input and the common mode input are defined by equation (2) and (3).

4=12-11---> (2)
1
+v)>(3)
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4=12-11---> (2) 1 +v)>(3)

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Step 3

From equation (2) and (3), the f...

> (4)
->(5)
2=1
2
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> (4) ->(5) 2=1 2

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