Adder Circuit Using Op Amp. In this circuit we are going to apply voltages to operational amplifiers from both inverting terminal and non inverting terminals. If the input resistors are unequal then the output voltage is a weighted sum and becomes.
Full Adder Circuit And Its Construction Circuit Circuit Theory Tutorial from in.pinterest.com
Sometimes we need a summing circuit to just add together two or more voltage signals without any amplification. In inverting amplifier there is only one voltage signal applied to the inverting input as shown below. 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.
If the input resistors are equal in value r 1 r 2 r then the summed output voltage is as given and the gain is 1.
Here we will use lm358 opamp to demonstrate the adder circuit. The following figure shows the inverting adder using op amp with two inputs v1 and v2. As the name suggests a summing amplifier is an op amp based circuit where multiple input signals of different voltages are added. Operational amplifiers opamp has so many interesting applications and we have already created many circuits using op amps.
