Operational Amplifier Fundamentals – Exercise – 3

141. Input impedance [Zin(I)] of an inverting amplifier is approximately equal to:

(a) Ri
(b) Rf + Ri
(c)
(d) Rf – Ri

Answer
Answer : (a)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

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

(a) 50
(b) 4 k
(c) 4.08 k
(d) 5 k

Answer
Answer : (b)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

143. With negative feedback, the returning signal

(a) is proportional to the output current
(b) is proportional to the differential voltage gain
(c) opposes the input signal
(d) aids the input signal

Answer
Answer : (c)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

144. The magnitude of closed-loop voltage gain (Acl) of an inverting amplifier equals:

(a) the ratio of the input resistance to the feedback resistance
(b) the open-loop voltage gain Aol
(c) the feedback resistance divided by the input resistance
(d) the input resistance

Answer
Answer : (c)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

145. A differential amplifier has a common-mode gain of 0.2 and a common-mode rejection ratio of 3250. What would the output voltage be if the single-ended input voltage was 7 mV rms?

(a) 1.4 mV rms
(b) 650 mV rms
(c) 4.55 V rms
(d) 0.455 V rms

Answer
Answer : (c)
Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss
Discuss : Write your answer. Click here.

Related Posts

  • Operational Amplifier Fundamentals - 1435555555555143. With negative feedback, the returning signal (a) is proportional to the output current (b) is proportional to the differential voltage gain (c) opposes the input signal (d) aids the input signal
    Tags: signal, input, differential, gain, voltage, output, amplifier, electronics, engineering
  • Operational Amplifier Fundamentals - 1025555555555102. What is the difference voltage if the inputs are an ideal opposite signal? (a) The differential gain times twice the input signal. (b) The differential gain times the input signal. (c) The common-mode gain times twice the input signal. (d) The common-mode gain times the input signal.
    Tags: signal, gain, input, differential, common-mode, amplifier, voltage, electronics, engineering
  • Operational Amplifier Fundamentals - 1065555555555106. What is the difference voltage if the inputs are an ideal in-phase signal? (a) The differential gain times twice the input signal. (b) The differential gain times the input signal. (c) The common-mode gain times twice the input signal. (d) The common-mode gain times the input signal.
    Tags: signal, gain, input, differential, common-mode, amplifier, voltage, electronics, engineering
  • Operational Amplifier Fundamentals - 1885555555555188. With negative feedback, the returning signal: (a) aids the input signal (b) is proportional to output current (c) opposes the input signal (d) is proportional to differential voltage gain
    Tags: signal, input, gain, voltage, differential, output, amplifier, electronics, engineering
  • Operational Amplifier Fundamentals - 1455555555555145. A differential amplifier has a common-mode gain of 0.2 and a common-mode rejection ratio of 3250. What would the output voltage be if the single-ended input voltage was 7 mV rms? (a) 1.4 mV rms (b) 650 mV rms (c) 4.55 V rms (d) 0.455 V rms
    Tags: amplifier, common-mode, voltage, differential, gain, output, input, electronics, engineering

LEAVE A REPLY

Please enter your comment!
Please enter your name here