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
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
Amplifiers » Exercise - 252. In order to obtain good gain stability in a negative voltage feedback amplifier (Av = voltage gain without feedback ; mv = feedback fraction), ............. (a) Av mv = 1 (b) Av mv >> 1 (c) Av mv < 1 (d) none of the above
Amplifiers » Exercise - 121. If the output of an amplifier is 10 V and 100 mV from the output is fed back to the input, then feedback fraction is ....... (a) 10 (b) 0.1 (c) 0.01 (d) 0.15
Amplifiers » Exercise - 140. In the expression for voltage gain with negative voltage feedback, the term 1 + Am mv is known as ........ (a) gain factor (b) feedback factor (c) sacrifice factor (d) none of the above
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