Electronic Devices - BJT Amplifiers

Exercise :: BJT Amplifiers - General Questions

51. 

Which of the following configurations has an output impedance Zo equal to RC?

A. Fixed-bias common-emitter
B. Common-emitter voltage-divider with bypass capacitor
C. Common-emitter voltage-divider without bypass capacitor
D. All of the above

Answer: Option D

Explanation:

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52. 

Refer to this figure. Find the value of Rin(base).

A. 420
B. 50 k
C. 940
D. 100.8

Answer: Option B

Explanation:

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53. 

For a common-emitter amplifier, the purpose of the emitter bypass capacitor is

A. no purpose, since it is shorted out by RE.
B. to reduce noise.
C. to despike the supply voltage.
D. to maximize amplifier gain.

Answer: Option D

Explanation:

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54. 

For BJT amplifiers, the ________ gain typically ranges from a level just less than 1 to a level that may exceed 1000.

A. voltage
B. current
C. impedance
D. All of the above

Answer: Option B

Explanation:

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55. 

The loaded voltage gain of an amplifier is always more than the no-load level.

A. True
B. False

Answer: Option B

Explanation:

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