Electronics - Operational Amplifiers

Exercise :: Operational Amplifiers - General Questions

36. 

If an op-amp has one input grounded and the other input has a signal feed to it, then it is operating as what?

A. Common-mode
B. Single-ended
C. Double-ended
D. Noninverting mode

Answer: Option B

Explanation:

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37. 

If the feedback/input resistor ratio of a feedback amplifier is 4.6 with 1.7 V applied to the noninverting input, what is the output voltage value?

A. 7.82 V
B. saturation
C. cutoff
D. 9.52 V

Answer: Option D

Explanation:

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38. 

The Schmitt trigger is a two-state device that is used for:

A. pulse shaping
B. peak detection
C. input noise rejection
D. filtering

Answer: Option A

Explanation:

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39. 

When a capacitor is used in place of a resistor in an op-amp network, its placement determines:

A. open- or closed-loop gain
B. integration or differentiation
C. saturation or cutoff
D. addition or subtraction

Answer: Option B

Explanation:

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40. 

mcq18_1012.gif

What value of input resistance is needed in the given circuit to produce the given output voltage?

A. 50 omega.gif
B. 4 komega.gif
C. 4.08 komega.gif
D. 5 komega.gif

Answer: Option B

Explanation:

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