Biomedical Engineering > GATE 2026 > Operational Amplifiers
The circuit shown below is used as an instrumentation amplifier. Among the resistors used in the input stage, the value of resistance of one of the resistors (R*) is slightly mismatched from that of the rest of the resistors (R). Assume all operational amplifiers are ideal.
Which of the following statements is/are true?
A
The resistance mismatch introduces a gain error
B
The resistance mismatch degrades the common mode rejection ratio (CMRR)
C
The resistance mismatch introduces an offset error
D
Vout is not sensitive to any resistance mismatch

Correct : a,b

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