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Analog Electronic Circuits
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Analog electronics circuits miscellaneous
» Question
Analog electronics circuits miscellaneous
Easy Questions
Analog Electronic Circuits
Analog electronics circuits miscellaneous
Increasing the value of RE in a differential amplifier:
increases the differential gain A
d
increases the common mode gain A
c
increases CMRR
decreases CMRR
Correct Option:
C
A
CM
=
–β
o
R
c
R
s
+ h
ie
+ (1 + β
o
)2R
E
since R
E
∝
1
A
CM
and CMRR ∝
1
A
CM
i.e. CMRR ∝ R
E
so on increasing R
E
CMRR increases.
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