Exercise: Bjt Amplifiers

Questions for: Bjt Amplifiers

A Darlington pair amplifier has
A:
high input impedance and high voltage gain.
B:
low input impedance and low voltage gain.
C:
a voltage gain of about 1 and a low input impedance.
D:
a low voltage gain and a high input impedance.
Answer: D
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A Darlington pair provides beta ________ for ________ input resistance.
A:
multiplication, decreased
B:
multiplication, increased
C:
division, decreased
D:
Answer: B
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Refer to this figure. If an emitter bypass capacitor was installed, what would the new Av be?

A:
4.96
B:
125
C:
398
D:
600
Answer: D
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The ________ the source resistance and/or ________ the load resistance, the less the overall gain of an amplifier.
A:
smaller, smaller
B:
smaller, larger
C:
larger, smaller
D:
larger, larger
Answer: C
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The input impedance of a BJT amplifier is purely ________ in nature and can vary from a few ________ to ________.
A:
resistive, ohms, megohms
B:
capacitive, microfarads, farads
C:
inductive, millihenrys, henrys
D:
None of the above
Answer: A
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