Instrumental Amplifier Circuit Diagram. The instrumentation amplifier will require three op amps. Almost any op amp will work for this design.

A circuit providing an output based on the difference between two inputs times a scale factor is given in the above figure. Here r r2 r3 r4 r5 r6 r7 which is 10k. The circuit diagram of a typical instrumentation amplifier using opamp is shown below.

The output voltage of the instrumentation amplifier circuit can be calculated using the below formulae.

The op amp 3 is a difference amplifier that forms the output stage of the instrumentation amplifier. The circuit diagram of a typical instrumentation amplifier using opamp is shown below. Working of instrumentation amplifier. Selecting an appropriate op amp is an important part in designing an instrumentation amplifier.