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Electronics
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Basic Op-Amp Circuits
Comments
Question
To operate properly, an oscillator requires an external ac input signal.
Options
A. True
B. False
Correct Answer
False
Basic Op-Amp Circuits problems
Search Results
1. When used as a
comparator
, an op-amp is wired in a closed-loop configuration.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
2. A
zero-level detector
is a type of comparator circuit.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
3. The feedback component in an
op-amp integrator
is a capacitor.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
4. When the capacitance in an
active high-pass filter
increases, the critical frequency decreases.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
5.
It takes ______ for the output voltage in the given circuit to reach its maximum value.
Options
A. 0 s
B. 243.9 µs
C. 1 ms
D. 1.22 ms
Show Answer
Scratch Pad
Discuss
Correct Answer: 1.22 ms
6. The output voltage of a summing amplifier is proportional to the product of the input voltages.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
7. The effectiveness of a filter in rejecting signals beyond cutoff frequency is a function of the filter roll-off rating.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
8. For a
Wien-bridge oscillator
to produce a sustained sine-wave output, the phase shift around the positive feedback loop must be greater than 0°.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
9. A two-pole active filter produces a roll-off rate of
?20 dB/decade
.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
10. The control element in a basic shunt voltage regulator is a zener diode.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
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