Subtractor Circuit Op Amp. Op amp is used to design a circuit whose output is the sum of several input signals. To study op amp as adder and subtractor circuit aic practical.
Now by applying kirchhoff current law at node 1 we get. Here is an op amp subtractor. The voltage output from the differential op amp a3 acting as a subtractor is simply the difference between its two inputs v2 v1 and which is amplified by the gain of a3 which may be one unity assuming that r3 r4.
The subtractor using op amp is shown in figure below.
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. To study op amp as adder and subtractor circuit aic practical. A difference amplifier or op amp subtractor is a specially designed op amp based amplifier circuit which amplifies the difference between two input signals and rejects any signals common to both inputs. There s a special op amp circuit a differential amplifier or subtractor that is actually a combination of a noninverting amplifier and inverting amplifier.
