An oscillator requires an amplifier

A)
with equal feedback
B)
with negative feedback
C)
with positive feedback
D)
with either positive or negative feedback

Correct Answer : Option (C) :   with positive feedback

Explanation : Positive feedback is necessary for sustained oscillations.

Recently Updated in Analog Electronics Questions
A junction Field Effect Transistor can operate in
A)
depletion mode only
B)
enhancement mode only
C)
depletion and enhancement modes
D)
neither depletion nor enhancement modes

Correct Answer :   depletion mode only

In a base driver amplifier the voltage gain is the ratio of
A)
ac emitter voltage to ac base voltage
B)
ac collector voltage to ac base voltage
C)
ac base voltage to ac emitter voltage
D)
ac collector voltage to ac emitter voltage

Correct Answer :   ac collector voltage to ac base voltage

In a CE amplifier it is desired that the signal should be able to swing equally in both directions. Then the Q point should be
A)
at the centre of dc load line
B)
at the centre of collector voltage
C)
at the centre of ac load line
D)
at the centre of collector current

Correct Answer :   at the centre of ac load line

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