Amplifiers » Exercise - 147. An amplifier has an open loop voltage gain of 1,00,000. With negative voltage feedback, the voltage gain is reduced to 100. What is the sacrifice factor ? (a) 1000 (b) 100 (c) 5000 (d) none of the above
Tags: amplifiers, gain, exercise, amplifier, open, loop, feedback, electronics, engineering
Feedback Amplifiers » Exercise - 14. Closed-loop gain of a feedback amplifier is the gain obtained when : (a) its output terminals are closed (b) negative feedback is applied (c) feedback loop is closed (d) feedback factor exceeds unity
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Amplifiers » Exercise - 145. If the voltage gain of an amplifier without feedback is 20 and with negative voltage feedback it is 12, then feedback fraction is ........ (a) 5/3 (b) 3/5 (c) 1/5 (d) 0.033
Tags: feedback, amplifiers, exercise, gain, amplifier, electronics, engineering
Amplifiers » Exercise - 123. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative voltage feedback is approximately ....... (a) 500 (b) 100 (c) 1000 (d) 5000
Tags: amplifiers, feedback, exercise, amplifier, gain, electronics, engineering
Feedback Amplifiers » Exercise - 110. The gain of a negative feedback amplifier is 40 dB. If the attenuation of the feedback path is 50 dB, then the gain of the amplifier without feedback is : (a) 78.92 (b) 146.32 (c) 215.51 (d) 317.23
Tags: feedback, amplifiers, gain, amplifier, exercise, electronics, engineering
Amplifiers » Exercise - 147. An amplifier has an open loop voltage gain of 1,00,000. With negative voltage feedback, the voltage gain is reduced to 100. What is the sacrifice factor ? (a) 1000 (b) 100 (c) 5000 (d) none of the above