In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db & 2db respectively, then its common mode rejection ratio is
A. 23dB
B. 25dB
C. 46dB
D. 50dB
Answer: Option C
This Question Belongs to Electrical Engineering >> OP Amp
Join The Discussion
Comments (3)
Related Questions on OP amp
Current cannot flow to ground through .
A. a mechanical ground
B. an a.c. ground
C. a virtual ground
D. an ordinary ground
When a step-input is given to an OP-amp integrator, the output will be
A. A ramp
B. A sinusoidal wave
C. A rectangular wave
D. A triangular wave with dc bias
CMRR = Adiff /Acom = Adiff [dB] – Acom [dB] = 48db-2dB = 46dB
CMRR=gain of diff voltage gain/gain of common mode , in here how its coming 46 answer
how CMRR is obtained