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Renesas Electronics Europe - Knowledgebase

What is Voltage follower?

Latest Updated:02/01/2006


Voltage follower


A voltage follower is a non-inverting amplifier that uses an operational amplifier. It consists of a circuit that returns 100% of the output signal to the minus side, and is therefore also called a full-feedback amplifier. The name comes from the fact that the output voltage tracks (follows) the input voltage (gain = 1).
This circuit has no gain, but since it has high input impedance and low output impedance, it is used for impedance conversion.


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