Exercise: Amplifier Frequency Response

Questions for: Amplifier Frequency Response

Refer to this figure. The output voltage at fcl = 12 mV. What is the output voltage at the midpoint frequency?

A:
12 mV
B:
12 mV p-p
C:
16.97 mV
D:
8.48 mV
Answer: C
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An amplifier has an Rin = 1.2 k. The coupling capacitor is 1 F. Determine the approximate lower cutoff frequency.
A:
133 Hz
B:
1.33 kHz
C:
13.3 kHz
D:
133 kHz
Answer: A
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A roll-off of 20 dB per decade is equivalent to a roll-off of ________ per octave.
A:
3 dB
B:
13 dB
C:
12 dB
D:
6 dB
Answer: D
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________ frequencies are values of frequency at which the RC circuits reduce the voltage gain to 70.7% of its midrange value.
A:
Critical
B:
Cutoff
C:
Corner
D:
all of the above
Answer: D
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Doubling the voltage gain causes a ________ dB ________.
A:
10, increase
B:
6, increase
C:
10, decrease
D:
6, decrease
Answer: B
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