Exercise: Bjt Amplifiers

Questions for: Bjt Amplifiers

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: C
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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: C
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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: D
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Which one of the following configurations has the lowest input impedance?
A:
Fixed-bias
B:
Common-base
C:
Emitter-follower
D:
Voltage-divider?
Answer: B
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For the common-emitter fixed-bias configuration, there is a ________ phase shift between the input and output signals.
A:
0º
B:
45º
C:
90º
D:
180º
Answer: D
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