Q. The output voltage of a common Emitter amplifier is

A
Amplified
B
Inverted
C
180 degree out of phase with the input
D
All the above
Solution:

Then a single stage Common Emitter Amplifier is also an ?Inverting Amplifier? as an increase in Base voltage causes a decrease in Vout and a decrease in Base voltage produces an increase in Vout. In other words the output signal is 180 degree out-of-phase with the input signal.

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