Differential Amplifier Calculator
Calculate the output of a single op-amp differential amplifier with matched resistor pairs.
V
V
kΩ
kΩ
Differential Gain
5.00 V/V
Output Voltage10.000 V
Differential Input2.000 V
Differential Gain vs Non-Inverting Input (V1)
Differential Amplifier
Amplifies the difference between two inputs while rejecting common-mode signals.
Formula (matched resistors)
V_out = (Rf / R1) x (V1 - V2)
Requires R1 = R2 and Rf = Rg for proper common-mode rejection.
Example Calculation
V1 = 3 V, V2 = 1 V, R1 = 10k, Rf = 50k.
- 01Gain = 50 / 10 = 5 V/V
- 02Differential input = 3 - 1 = 2 V
- 03V_out = 5 x 2 = 10 V
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