[33]VOLTAGE FOLLOWER CIRCUIT BY OP-AMP
Voltage follower can be defined as when the output of the op-amp circuit follows the input of the op-amp directly. So both the input and output voltages are the same. This circuit doesn’t supply any amplification. As a result, voltage gain is equivalent to 1. It is also known as unity gain, buffer & isolation amplifier. This circuit has high input impedance so it is used in different circuits. The voltage follower uses the input signal to give efficient isolation of output. The basic diagram is shown below.