Electronics - Special-Purpose Op-Amp Circuits

Exercise :: Special-Purpose Op-Amp Circuits - General Questions

6. 

The primary function of the oscillator in an isolation amplifier is to

A. convert dc to high-frequency ac
B. convert dc to low-frequency ac
C. rectify high-frequency ac to dc
D. produce dual-polarity dc voltages for the input to the demodulator

Answer: Option A

Explanation:

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7. 

mcq20_1008_1.jpg
Refer to Figure 20-2. This circuit is a setup for

A. an antilog amplifier
B. a constant-current source
C. an instrumentation amplifier
D. an isolation amplifier

Answer: Option B

Explanation:

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8. 

An instrumentation amplifier has a high

A. output impedance
B. power gain
C. CMRR
D. supply voltage

Answer: Option C

Explanation:

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9. 

This circuit is a setup for

A. an antilog amplifier
B. a constant-current source
C. an instrumentation amplifier
D. an isolation amplifier

Answer: Option D

Explanation:

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10. 

Circuits that shift the dc level of a signal are called

A. limiters
B. clampers
C. peak detectors
D. dc converters

Answer: Option B

Explanation:

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