Exercise: Bjt Amplifiers

Questions for: Bjt Amplifiers

To analyze the common-emitter amplifier, what must be done to determine the dc equivalent circuit?
A:
leave circuit unchanged
B:
replace coupling and bypass capacitors with opens
C:
replace coupling and bypass capacitors with shorts
D:
replace VCC with ground
Answer: B
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Which of the following is (are) true to achieve a good overall voltage gain for the circuit?
A:
The effect of Rs and RL must be considered as a product.
B:
The effect of Rs and RL must be considered as a product and evaluated individually.
C:
The effect of Rs and RL must be evaluated individually.
D:
None of the above
Answer: B
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In a common-base amplifier, the input signal is connected to the
A:
base.
B:
collector.
C:
emitter.
D:
output.
Answer: C
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Refer to this figure. Determine the value of VC.

A:
20 V
B:
10 V
C:
5 V
D:
0 V
Answer: C
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When the bypass capacitor is removed from a common-emitter amplifier, the voltage gain
A:
increases.
B:
decreases.
C:
has very little effect.
D:
Answer: B
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