缓冲放大器(英语:buffer amplifier,有时简称缓冲器),是一种在一个电路与另一个电路之间提供阻抗变换的设备。缓冲放大器主要包括电压缓冲器和电流缓冲器。

一个基于运算放大器的缓冲放大器,输入电压等于输出电压

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