Differential Amplifier and Common-
Mode Signals
•
Apply sinusoids to
both bases:
–
Same amplitude,
180
°
difference in
phase,
if
V
in1
= –
V
in2
V
out
= 2
V
in
◦
V
CC
I
C2
I
C1
R
C1
R
C2
Q
1
Q
2
I
E
R
E
◦