数字钟的广播自动调校

Digital clock is automatically adjusted by broadcast

以单片机为核心 ,读出即时时钟芯片中的时间数据 ,构成典型的数字时钟 ;利用锁相环技术 ,将广播电台的对时信号分离出来 ,供单片机自动调校数字钟表的走时。

Base on PLL(Phase Locked Loop) technology , the pip(time signal) is extracted from broadcast.By this signal,the time of the digital clock is automatically adjusted under the control of Single Chip Microcomputer(SCM).