Exercise: Special Purpose Op Amp Circuits

Questions for: Special Purpose Op Amp Circuits

A voltage-to-current converter is used in applications where it's necessary to have an output load current that is controlled by _________.
A:
input frequency
B:
output resistance
C:
input voltage
D:
input resistance
Answer: C
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The ________ amplifier is ideal for amplitude modulation since its gain is current-controlled.
A:
log
B:
operational transconductance
C:
isolation
D:
Schmitt
Answer: B
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If an operational transconductance amplifier (OTA) is used as an amplitude modulator, the voltage gain is varied by applying a _________ voltage to the ______ input.
A:
demodulation, bias
B:
modulation, bias
C:
bias, modulation
D:
low-frequency, bias
Answer: B
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The external resistor of a typical instrumentation amplifier is used to set the ________.
A:
impedance
B:
rejection ratio
C:
gain
D:
isolation
Answer: C
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An instrumentation amplifier has extremely high ________, good ________, and high ________.
A:
input impedance, common-mode rejection, gain
B:
noise factor, grounding, power
C:
working voltages, current capacity, output impedance
D:
output gain, output loading, power
Answer: A
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