An instrumentation amplifier is a device that amplifies the difference between two input signal voltages while rejecting any signals that are common to both inputs.

• 仪表放大器是一种放大两个输入信号电压之差的同时又抑制这两个输入端共模信号的器件,因此,仪表放大器在从传感器和其它信号源提取微弱信号时提供非常重要的功能。