Electronic Devices - BJT Amplifiers

Exercise :: BJT Amplifiers - General Questions

26. 

Which of the following represent(s) the advantage(s) of the system approach over the r-model approach?

A. Thevenin's theorem can be used.
B. The effect of changing the load can be determined by a simple equation.
C. There is no need to go back to the ac equivalent model and analyze the entire network.
D. All of the above

Answer: Option D

Explanation:

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27. 

The differential amplifier has

A. one input and one output.
B. two inputs and two outputs.
C. two inputs and one output.
D. one input and two outputs.

Answer: Option C

Explanation:

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28. 

The emitter-follower configuration has a ________ impedance at the input and a ________ impedance at the output.

A. low, low
B. low, high
C. high, low
D. high, high

Answer: Option C

Explanation:

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29. 

The differential amplifier produces outputs that are

A. common mode.
B. in-phase with the input voltages.
C. the sum of the two input voltages.
D. the difference of the two input voltages.

Answer: Option D

Explanation:

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30. 

The ________ model suffers from being limited to a particular set of operating conditions if it is to be considered accurate.

A. hybrid equivalent
B. re
C.
D. Thevenin

Answer: Option A

Explanation:

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