Discriminator: a device that converts a property of an input signal such as frequency or phase into an amplitude variation depending on how the signal differs from a standard or reference signal.

鉴别器，鉴频器：一种将输入信号的某一特征，如频率或相位转变为幅度变化装置，其变化大小因信号与标准或参考信号的不同程度而异。

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This paper describes the input circuit and anti-interference measures of A-D-A type digital frequency discriminator used in the speed governing system of hydraulic turbines.

本文介绍用于水轮机调速系统中的A-D-A型数字鉴频器的输入电路和抗干扰措施。

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