用EPROM设计的电视同步机的一种外锁相方法

External phase Locking Method for Synchronized Signal Generator Using EPROM

由于压控晶体振荡器频率变化范围的限制,通过压控晶体振荡器实现帖锁定的速度是很慢的。本文基于用EPROM设计的同步机本身所具的特点,提出一种不通过压控晶体振荡器实现帧锁定的方法,整个系统的入锁时间小于0.2秒。

Limited by the shifting scope of the VCO's frequency, the speed of vertical phase locking is very low since it is realized by changing the VCO's frequency. This paper carries one a phase locking method based on the generator's own characteristics. The phase locking time of the proposed system is less than 0.2 sec.