Power Amplifiers - Practice Questions

Question 1

Which of the push-pull amplifiers is presently the most popular form of the class B power amplifier?

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Question 2

Which of the following describe(s) a power amplifier?

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Question 3

What is the maximum efficiency of a class B circuit?

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Question 4

In practice, the efficiency of a capacitively coupled class A amplifier is about ________%.

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Question 5

What is the ratio of the secondary voltage to the primary voltage with the turn ratio in the windings?

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Question 6

In a class AB amplifier, if the VBE drops are not matched to the diode drops or if the diodes are not in thermal equilibrium with the transistors, this can result in

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Question 7

Class B operation is provided when the dc bias leaves the transistor biased just off, the transistor turning on when the ac signal is applied.

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Question 8

Which class of amplifier operates in the linear region for only a small part of the input cycle?

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Question 9

The efficiency of any amplifier is the ratio of signal output power to signal input power.

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Question 10

A class ________ amplifier is biased slightly above cutoff and operates in the linear region for slightly more than 180&ordm; of the input cycle.

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