Electronic Devices - Operational Amplifiers - Discussion

Discussion Forum : Operational Amplifiers - General Questions (Q.No. 3)

Operational Amplifiers

Refer to this figure. The purpose of R₃ is

for bias current compensation.

for input offset voltage compensation.

to set input impedance.

to set input impedance and voltage gain.

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

4 comments Page 1 of 1.

Pallavi said: 1 decade ago

The voltage drop across R1 must match with the drop across R3 for equal values of bias current.

Amit said: 1 decade ago

If r3 is missing then it will decompensiate the output below the 0.

Keyurshah said: 1 decade ago

What happen when R3 will be removed?

Monica said: 1 decade ago

Why not ans: B?

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