An analog device that is typically used for impedance matching and signal isolation. For example, a sound card typically uses buffer amps at most of its input and output ports.
"buffer amplifier." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/buffer-amplifier>.
buffer amplifier. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/buffer-amplifier