Operational Amplifier Fundamentals – Exercise – 4

191. The input voltage must be ______ in the given circuit to obtain the given output voltage.

(a) 343 mV
(b) 400 mV
(c) 480 mV
(d) 600 mV

Answer
Answer : (b)
Explanation
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192. The voltage gain of the amplifier in the given circuit would increase if ______.

(a) the feedback resistor was decreased in value
(b) the input voltage was increased
(c) the input resistor was increased in value
(d) None of the above

Answer
Answer : (d)
Explanation
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193. Current cannot flow to ground through a(n) ________.

(a) mechanical ground
(b) ac ground
(c) virtual ground
(d) virtual short

Answer
Answer : (c)
Explanation
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194. The feedback resistor has a value of ______ in the given circuit

(a) 2 k
(b) 10.5 k
(c) 21 k
(d) 40 k

Answer
Answer : (d)
Explanation
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195. The common-mode rejection ratio (CMMR) is the ratio of _____ to ______.

(a) the differential voltage gain, the common-mode voltage gain
(b) the differential power gain, the common-mode power gain
(c) the ideal voltage gain, the actual voltage gain
(d) signal voltage, noise voltage

Answer
Answer : (a)
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