Question

Determine the Vout of Summing Amplifier.

VIN1 = -150mV
VIN2 = + 50mV
VIN3 = +200mV
VIN4 = +100mV

R1 = 1.0kΩ
R2 = 1.0kΩ
R3 = 1.0kΩ
R4 = 1.0kΩ
Rf = 10kΩ

Answer 1

Using the formula for a summing amplifier,

Vout = -Rf * (Vin1/R1 + Vin2/R2 + Vin3/R3 + Vin4/R4)

Substituting the given values,

Vout = -10kΩ * (-150mV/1.0kΩ + 50mV/1.0kΩ + 200mV/1.0kΩ + 100mV/1.0kΩ)

Vout = -10kΩ * (0.2)

Vout = -2.0V

Therefore, the Vout of the summing amplifier is -2.0V.