Find the value of input resistance for differential amplifier with one op-amp. If R1 = R2=100Ω and RF = R3 =5kΩ.
A. RIFx = 110Ω; RIFy = 6.7kΩ
B. RIFx = 100Ω; RIFy = 5.1kΩ
C. RIFx = 150Ω; RIFy = 7.2kΩ
D. RIFx = 190Ω; RIFy = 9.0kΩ
Answer:A
Find the value of input resistance for differential amplifier with one op-amp. If R1 = R2=100Ω and RF = R3 =5kΩ.
A. RIFx = 110Ω; RIFy = 6.7kΩ B. RIFx = 100Ω; RIFy = 5.1kΩ C. RIFx = 150Ω; RIFy = 7.2kΩ D. RIFx = 190Ω; RIFy = 9.0kΩ
Explanation: The input resistance of inverting amplifier is RIFx = (R1) and the input resistance of non-inverting amplifier is RIFy = (R2+ R3)