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Electronic Devices - Power Amplifiers

Exercise : Power Amplifiers - Filling the Blanks
21.
In a class A transformer-coupled power amplifier, ________ winding resistance of the transformer determine(s) the dc load line for the circuit.
the ac
the dc
both the ac and dc
neither the ac nor dc
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A form of class A amplifier having maximum efficiency of ________ uses a transformer to couple the output signal to the load.
90%
78.5%
50%
25%
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
A heat sink provides ________ thermal resistance between case and air.
a high
a low
the same
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
In class B operation, the current drawn from a single power supply has the form of ________ rectified signal.
a full-wave
a half-wave
both a full-wave and a half-wave
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
A ________ power amplifier is limited to use at one fixed frequency.
class A
class B or AB
class C
class D
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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