Editing Buffer amplifier (section)

{{Short description|Electronic amplifier, a circuit component}}
[[Image:Ideal Buffers.svg|thumbnail|200px|Figure 1: Ideal voltage buffer (top) and current buffer (bottom)]]{{Not to be confused with|Data buffer}}
In [[electronics]], a '''buffer amplifier''' is a [[unity gain]] [[amplifier]] that copies a [[signal]] from one [[Electrical network|circuit]] to another while transforming its [[electrical impedance]] to provide a more ideal source (with a ''lower'' [[output impedance]] for a '''voltage buffer''' or a ''higher'' output impedance for a '''current buffer'''). This "buffers" the signal source in the first circuit against being affected by currents from the [[electrical load]] of the second circuit and may simply be called a '''buffer''' or '''follower''' when context is clear.