Exercise: Bjt Amplifiers

Questions for: Bjt Amplifiers

Which of the following techniques can be used in the sinusoidal ac analysis of transistor networks?
A:
Small-signal
B:
Large-signal
C:
Small- or large-signal
D:
None of the above
Answer: C
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What is the controlling current in a common-base configuration?
A:
Ie
B:
Ic
C:
Ib
D:
None of the above
Answer: A
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What is re equal to in terms of h parameters?
A:
hre / hoe
B:
(hre + 1) / hoe
C:
hie – (hre / hoe)(1 + hfe)
D:
hfe
Answer: A
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What is the limit of the efficiency defined by = Po / Pi?
A:
Greater than 1
B:
Less than 1
C:
Always 1
D:
None of the above
Answer: B
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Refer to this figure. The output signal from the first stage of this amplifier is 0 V. The trouble could be caused by

A:
an open C4.
B:
an open C2.
C:
an open base-emitter of Q1.
D:
a shorted C4.
Answer: C
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