9
Differential
Amplifier and Common-Mode Signals
•Apply
sinusoids to both
bases:
–Same amplitude, 180° difference in phase,
if Vin1 = –Vin2
Vout = 2Vin
RE
–VEE
IE
Q1
Q2
__
_
-
◦
RC2
RC1
IC1
IC2
VCC
◦
__
_
-