Voltage Follower

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 Advantages of Voltage Followers The advantages of voltage followers include: Provides power gain and current gain. Low output impedance to the circuit, which uses the output of the voltage follower. The Op-amp takes zero current from the input. Loading effects can be avoided . Applications of Voltage Followers Some of the applications of voltage followers include: Buffers for logic circuits. In Sample and hold circuits. In Active filters. In Bridge circuits via a transducer.