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Electronic Devices - BJT Amplifiers

Exercise : BJT Amplifiers - General Questions
21.
Refer to this figure. Calculate the value of Rin(tot).

37.7 k
3.77 k
378
2.25 k
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
What is the range of the current gain for BJT transistor amplifiers?
less than 1
1 to 100
above 100
All of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
What does the negative sign in the voltage gain of the common-emitter fixed-bias configuration indicate?
The output and input voltages are 180º out of phase.
Gain is smaller than 1.
Gain is larger than 1.
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
For the common-emitter fixed-bias configuration, there is a ________ phase shift between the input and output signals.
0º
45º
90º
180º
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
Which one of the following configurations has the lowest input impedance?
Fixed-bias
Common-base
Emitter-follower
Voltage-divider?
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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