Electronic Devices - Op-Amp Applications

Exercise :: Op-Amp Applications - Filling the Blanks

1. 

In an instrumentation amplifier, the output voltage is based on the ________ times a scale factor.

A. summation of the two inputs
B. product of the two inputs
C. difference between the two inputs
D. None of the above

Answer: Option C

Explanation:

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2. 

In a millivoltmeter, the diodes and the capacitor are used in ________ parts of the circuit.

A. the dc
B. the ac
C. both the dc and ac
D. neither the dc nor ac

Answer: Option B

Explanation:

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3. 

________ can be used as a voltage-controlled voltage source.

A. Only an inverting op-amp circuit
B. Only a noninverting op-amp circuit
C. Neither inverting nor noninverting op-amp circuits
D. Both inverting and noninverting op-amp circuits

Answer: Option D

Explanation:

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4. 

The output voltage of a voltage buffer is ________ with the input voltage.

A. in phase
B. 45º out of phase
C. 90º out of phase
D. 180º out of phase

Answer: Option A

Explanation:

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5. 

Op-amp circuits are used in ________ voltmeters.

A. only dc
B. only ac
C. both ac and dc
D. neither ac nor dc

Answer: Option C

Explanation:

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