# Summing Amplifier

Operational amplifiers can be used for simulating mathematical operations like addition, integration, differentiation etc.

# Objective

Make a summing amplifier using an Op-Amp and test it.

# Procedure

- Make the circuit on bread board, as shown. Use 1kΩ for all resistors
- Set PV1 and PV2 to 1V each
- Enable A1, A2 and A3
- Observe the outputs. Verify that the output is the sum of inputs

The output is given by Vout=(R1)/(Rf)V1+(R2)/(Rf)V2+ ...

# Discussion

The summation can be done using AC waveforms also. Our supply voltage is only 6V. So the output should be kept less than 4V.

- Replace R1 with 10kΩ and feed SQ1 instead of PV1.