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Compute the output voltage for voltage follower with offset voltage compensating network?

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+1 vote
in Linear Integrated Circuits by (38.2k points)
Compute the output voltage for voltage follower with offset voltage compensating network?

(a) 3.6v

(b) 10.8v

(c) 26v

(d) 33v

I had been asked this question in an interview.

I would like to ask this question from Input Offset Voltage in section Operational Amplifier Fundamentals of Linear Integrated Circuits

1 Answer

0 votes
by (39.8k points)
The accurate answer is (b) 10.8v

Grasp the essence with: The output voltage is given as Vo= {1+[ RC/( Rb+ (Rmax/4))]}*Vin.

Rmax=Ra/4 = 20kΩ/4 = 5kΩ.

Vo=[1+(39kΩ/(10kΩ+5kΩ))]*3v = 10.8v.

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