Special Purpose Op Amp Circuits – Exercise – 1

41. A(n) ________ amplifier is used if the application requires a high sensitivity to low-level signals and protection from high-voltage associated circuits.

(a) basic instrumentation
(b) operational transconductance
(c) log/antilog amplifier
(d) isolation

Answer
Answer : (d)
Explanation
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42. The basic instrumentation amplifier has ________ input(s).

(a) 1
(b) 2
(c) capacitive
(d) resistive

Answer
Answer : (b)
Explanation
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43. The precision rectifier circuit is designed to _________.

(a) rectify waveforms with very large voltage swings
(b) rectify waveforms with very small voltage swings
(c) rectify precision waveforms
(d) amplify and rectify waveforms

Answer
Answer : (b)
Explanation
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44. An instrumentation amplifier has a high

(a) output impedance
(b) power gain
(c) CMRR
(d) supply voltage

Answer
Answer : (c)
Explanation
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45. In the classic three-op-amp instrumentation amplifier, the differential voltage gain is usually produced by the

(a) first stage
(b) second stage
(c) mismatched resistors
(d) output op-amp

Answer
Answer : (a)
Explanation
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