Exercise: Basic Op Amp Circuits

Questions for: Basic Op Amp Circuits

In order to sustain oscillations in a feedback oscillator, the gain should be _________ so the Acl _______.
A:
reduced, equals one
B:
reduced, is less than one
C:
increased, is more than one
D:
increased, is much greater than one
Answer: A
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Above the critical frequency (fc) of a low-pass filter, the output voltage gain _______.
A:
does not change
B:
doubles for every 1 kHz increase in frequency
C:
increases
D:
decreases
Answer: D
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The reference voltage for the comparator in the given circuit equals ______.

A:
0 V
B:
+8.8 V
C:
+16 V
D:
+7.2 V
Answer: B
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In the given circuit, if Rf is reduced to 8 k, the circuit becomes the ______.

A:
digital-to-analog converter
B:
averaging amplifier
C:
scaling adder
D:
summing amplifier with gain greater than unity
Answer: B
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A mathematical operation for finding the area under the curve of a graph is called __________.
A:
differentiation
B:
integration
C:
curve averaging
D:
linear regression
Answer: B
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