摘要
本文具体介绍了用于井下中频单边带通信机中频率合成器，详细分析了电流型鉴频，鉴相合成器锁相环的性能和特点，并且设计了电流型鉴频。
A frequency synthesizer used in the single side band transmitter in coal mine was introduced and the Characteristics of the phase locked loop of the current frequency and phase discriminator were analysed in detail. Moreover,its circuit was designed by the culthor.
