discriminator
/dɪˈskrɪmɪneɪtə(r)/noun
1
- a characteristic which enables things, people, or classes to be distinguished from one another（事物, 人或阶层的）鉴别特征, 区别性特征：
age should not be used as a primary discriminator in recruitment.
年龄不应成为招聘时的主要区分标准。
2
- Electronics a circuit or device which only produces an output when the input exceeds a fixed value【电子】甄别器, 鉴频器。
2.1
- a circuit which converts a frequency-modulated signal into an amplitude-modulated one将调频信号转换成调幅信号的线路。