Question

Following figure is a signal conditioning Amplifier, changes gain depending upon the polarity of Vs. What will be circuit voltage gain for + Vs and for - Vs if D2 is ideal.

a.

AV = -R3/R1

b.

R3/R1

c.

R1/R3

d.

1 + R3/R1

Answer: (a).AV = -R3/R1

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Q. Following figure is a signal conditioning Amplifier, changes gain depending upon the polarity of Vs. What will be circuit voltage gain for + Vs and for - Vs if D2 is ideal.

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