8
RE
–VEE
IE
RC2
RC1
IC1
IC2
VCC
Q1
Q2
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_
-
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◦
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_
-
Differential
Amplifier and Common-Mode Signals
•Apply same signal to both Bases
Vout = Vout1 – Vout2 ≈ 0
–Eliminates common-mode signals
–60 Hz
–Noise