Exercise: Operational Amplifiers

Questions for: Operational Amplifiers

________ is the unit for the slew rate, SR.
A:
V/ms
B:
ms/V
C:
V
D:
V/s
Answer: A
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The common-mode rejection ratio (CMRR) is defined by ________.
A:
Ad / Ac
B:
Ac / Ad
C:
Ad × Ac
D:
Ad + Ac
Answer: A
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Which of the following is (are) the result of gain reduction by a feedback?
A:
The amplifier voltage gain is a more stable and precise value.
B:
The input impedance of the circuit is increased over that of the op-amp alone.
C:
The output impedance is reduced over that of the op-amp alone.
D:
All of the above
Answer: D
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Refer to the given figure. The unity-gain bandwidth of this op-amp is 10.4 kHz. What is the bandwidth of the circuit?

A:
10.4 kHz
B:
15.5 kHz
C:
3 MHz
D:
16.7 kHz
Answer: A
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At what input voltage level does the output voltage level become numerically equal to the value of the common-mode gain of the amplifier?
A:
Vi1 = –Vi2 = 0.25 V
B:
Vi1 = –Vi2 = 0.50 V
C:
Vi1 = –Vi2 = 0.75 V
D:
Vi1 = –Vi2 = 1.00 V
Answer: B
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