Op Amp Adder Circuit. A typical summing amplifier with three input voltages v 1 v 2 and v 3. The following figure shows the inverting adder using op amp with two inputs v1 and v2.
Today we are going to study one more application of opamp which is to add two or more input voltages and the circuit is called summing amplifier or opamp adder. Operational amplifiers opamp has so many interesting applications and we have already created many circuits using op amps. Op amp adder and subtractor applications of operational amplifiers in tamil.
Let us assume currents i1 and i2 are flowing through resistances r1 and r2 respectively.
Thus by kcl at inverting terminal we get. As its name implies the non inverting summing amplifier is based around the configuration of a non inverting operational amplifier circuit in that the input either ac or dc is applied to the non inverting terminal while the required negative feedback and gain is achieved by feeding back some portion of the output signal v out to the inverting terminal as shown. Operational amplifiers opamp has so many interesting applications and we have already created many circuits using op amps. Since input current to the op amp is zero the two currents are added to get current i which flows through the feedback resistance rf.
