Exercise: Operational Amplifiers

Questions for: Operational Amplifiers

If the gain of a closed-loop inverting amplifier is 3.9, with an input resistor value of 1.6 kilohms, what value of feedback resistor is necessary?
A:
6240 ohms
B:
2.4 kilohms
C:
410 ohms
D:
0.62 kilohms
Answer: A
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What is the frequency of this 555 astable multivibrator?

mcq15_1038_1.gif
A:
278 Hz
B:
178 Hz
C:
78 Hz
D:
8 Hz
Answer: B
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The ratio between differential gain and common-mode gain is called:
A:
amplitude
B:
differential-mode rejection
C:
common-mode rejection
D:
phase
Answer: C
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What is the output waveform of the circuit?

A:
sine wave
B:
square wave
C:
sawtooth wave
D:
triangle wave
Answer: B
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The voltage follower has a:
A:
closed-loop voltage gain of unity
B:
small open-loop voltage gain
C:
closed-loop bandwidth of zero
D:
large closed-loop output impedance
Answer: A
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