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Analog Electronic Circuits
»
Analog electronics circuits miscellaneous
» Question
Analog electronics circuits miscellaneous
Easy Questions
Analog Electronic Circuits
Analog electronics circuits miscellaneous
An op-amp has a CMRR of 90 dB. If its differential voltage gain is 30,000.Then its common mode gain is:
1
.95
.85
None of these.
Correct Option:
B
CMRR = 20 log
10
A
d
A
c
90 = 20 log
10
30,000
A
c
4.5 = log
10
30,000
A
c
or A
c
=
30‚000
=
30‚000
= 0.9459 = 0.95
104.5
31622.77
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