Exercise: Power Amplifiers

Questions for: Power Amplifiers

The amount of power dissipated by the transistor is the ________ of that drawn from the dc supply (set by the bias point) and the amount delivered to the ac load.
A:
summation
B:
product
C:
difference
D:
average
Answer: C
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Improvement in production techniques of power transistors have ________.
A:
produced higher power ratings in small-sized packaging cases
B:
increased the maximum transistor breakdown voltage
C:
provided faster-switching power transistors
D:
All of the above
Answer: D
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________ transistors can be used to build a class B amplifier.
A:
npn and pnp
B:
nMOS and pMOS
C:
Both npn and pnp or nMOS and pMOS
D:
None of the above
Answer: C
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The highest efficiency is obtained in class B operation when the level of VL(p) is equal to ________.
A:
0.25VCC
B:
0.50VCC
C:
VCC
D:
2VCC
Answer: C
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A class A amplifier dissipates ________ power when the load is drawing maximum power from the circuit.
A:
the least
B:
about the same
C:
the most
D:
None of the above
Answer: A
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