Special Purpose Op Amp Circuits – Exercise – 2

Special Purpose Op Amp Circuits » Exercise – 2

51. 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
Answer : (a)
Explanation
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52. 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
Answer : (c)
Explanation
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53. 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
Answer : (b)
Explanation
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