用MC145152-2实现具有四模数分频器的锁相环

对MC145152-2常规的几种使用方法进行了总结,提出了一种用MC145152-2实现四模数分频器的PLL的新方法。此方法采用两块MC145152-2和两块双模数前置分频器,由两块双模数前置分频器构成四个分频模式,因而称其为四模数方案。四模数分频器保证了PLL的分频系统连续变化。降低了分频系数下限值,增大了分频系数连续变化的范围,解决了PLL中的高频与低分频系数之间的矛盾。按此方法设计的电路已成功应用于某工程。

Utilizing MC145152-2 to Realize PLL of Four Module Frequency Divider

Several normal usages of MC145152 2 are summarized.A new way of using MC145152 2 to realize PLL of four module frequency divider is put forward.In this way,two MC145152 2 and two double module preposition frequency dividers are adopted.Two double module preposition frequency dividers form four frequencies,hence called four module.Four module frequency divider ensures that frequency coefficient of PLL changes continuously,reduces frequency coefficient minimum,increases frequency coefficient scope of continuous changes and solves the contradictory of high frequency and low frequency coefficients.The circuit designed according to this way has been already used in engineering successfully.