Biomedical Engineering > GATE 2026 > Operational Amplifiers
If the operational amplifier in the circuit below is ideal, the input impedance looking into terminal Vin is __________ (Vin connects to the non-inverting input through resistor R; the inverting input has R1 and feedback resistor RF)
A
B
−(R × R1)/RF
C
(R × RF)/R1
D
R

Correct : a

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