#211 What is the range of the voltage-gain adjustment

What is the range of the voltage-gain adjustment - Electrical Engineering 

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What is the range of the voltage-gain adjustment in the circuit of Fig.?

FIG.

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Free Chegg Answer

Refer FIG. 10.63 in textbook.

Write the expression for voltage gain of an inverting amplifier.

For maximum value of the voltage gain of amplifier, the value input resistance will be without additional resistance. The input resistance for minimum voltage gain is .

Substitute  for , and  for  to calculate  as follows:

Hence, the maximum voltage gain of the amplifier is .

Write the expression for voltage gain of an inverting amplifier.

For minimum value of the voltage gain of amplifier, the value input resistance will be with additional resistance. The input resistance for maximum voltage gain is . Since

Substitute  for , and  for  to calculate  as follows:

Hence, the maximum voltage gain of the amplifier is .