Subtractor Op Amp Circuit. Now by applying kirchhoff current law at node 1 we get. 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.
An operational amplifier often op amp or opamp is a dc coupled high gain electronic voltage amplifier with a differential input and usually a single ended output. Such a circuit is called a summing amplifier or a summer or adder. 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.
The subtractor using op amp is shown in figure below.
The subtractor using op amp is shown in figure below. The subtraction of the two input voltages is possible with the help of subtractor. Then we have a general expression for overall voltage gain of the instrumentation amplifier circuit as. To study op amp as adder and subtractor circuit aic practical.
