Why is the CMRR of an op amp defined as \$20\log(A_d/A_c)\$?
I know that the value of \$A_d\$ is far greater than \$A_c\$, so we take the log, but why we are multiplying 20 with it?
Why CMRR of an op amp is defined in such a way?
Priyadarshi Paul
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