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
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
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
and feed SQ1 instead of PV1