Exercise: Bjt Amplifiers

Questions for: Bjt Amplifiers

What does the negative sign in the voltage gain of the common-emitter fixed-bias configuration indicate?
A:
The output and input voltages are 180º out of phase.
B:
Gain is smaller than 1.
C:
Gain is larger than 1.
D:
None of the above
Answer: A
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What is the range of the current gain for BJT transistor amplifiers?
A:
less than 1
B:
1 to 100
C:
above 100
D:
All of the above
Answer: D
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Refer to this figure. Calculate the value of Rin(tot).

A:
37.7 k
B:
3.77 k
C:
378
D:
2.25 k
Answer: B
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What is the unit of the parameter ho?
A:
Volt
B:
Ohm
C:
Siemen
D:
No unit
Answer: C
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What is the typical range of the output impedance of a common-emitter configuration?
A:
10 to 100
B:
1 k to 5 k
C:
40 k to 50 k
D:
500 k to 1 k
Answer: C
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