Exercise: Operational Amplifiers

Questions for: Operational Amplifiers

An oscillator whose frequency can be controlled by an input "control voltage" is called a(n) ______ .
A:
PLL
B:
Schmitt trigger
C:
VCO
D:
S-R latch
Answer: C
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The given circuit is ___.

A:
an inverting amplifier
B:
a noninverting amplifier
C:
a voltage follower
D:
a differential amplifier
Answer: B
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Current cannot flow to ground through a(n) ________.
A:
mechanical ground
B:
ac ground
C:
virtual ground
D:
virtual short
Answer: C
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______ is NOT a characteristic of an ideal op-amp.
A:
Infinite voltage gain
B:
Minimum bandwidth
C:
Infinite input impedance
D:
Zero output impedance
Answer: B
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The resistors Rf and Ri in an op-amp circuit control ______ .
A:
positive feedback and current gain
B:
negative feedback and power gain
C:
negative feedback and voltage gain
D:
open and closed loop gain
Answer: C
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