Origin

USA

Buffer

Introduction
A buffer is one that provides impedance transformation from high to low between one circuit and another. Typically a buffer is used to transfer a voltage from a first circuit, having a high impedance level, to a second circuit with a lower impedance level. The interposed buffer amplifier prevents the second circuit from loading the first circuit unacceptably and interfering with its desired operation. If the voltage is transferred unchanged, the amplifier is a unity gain buffer; also known as a voltage follower. The circuit makes a copy of the input voltage at the output without drawing any current from the input.

Feature