A device that converts a property of an input signal, such as frequency or phase, into an amplitudevariation, 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。