Asked Nov 12, 2019

An Opamp has a CMRR of 104. The value of the difference gain Ad is 105. estimate the value of the common mode gain Ac.


Expert Answer

Step 1

As given in the question value of common mode rejection ratio (CMMR) is 104.

And the value of differential gain Ad is 105.

Step 2

Although formula of CMMR is


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Diffrential gain (A CMMR common modegain(A

Step 3

Hence, plugging the given value...


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103 104 common modegain (A 105 Ac 104 A 10


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