Exercise: Fet Amplifiers

Questions for: Fet Amplifiers

Referring to this figure, calculate Zo if rd = 19 k.

A:
1.75 k
B:
1.81 k
C:
1.92 k
D:
2.00 k
Answer: B
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Referring to the figure below, determine the output impedance for VGS = –3 V at VDS = 5 V.

A:
100 k
B:
80 k
C:
25 k
D:
5 k
Answer: A
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What common factor determines the voltage gain and input resistance of a common-gate amplifier?
A:
RD
B:
RL
C:
gm
D:
Answer: C
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Which FET amplifier(s) has (have) a phase inversion between input and output signals?
A:
common-gate
B:
common-drain
C:
common-source
D:
all of the above
Answer: C
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Refer to this figure. If ID = 4 mA, find the value of VGS.

A:
10.8 V
B:
6 V
C:
–0.7 V
D:
–6 V
Answer: D
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