基于CPLD的锁相频率合成电路设计

摘要

以锁相环芯片LMX2306为核心，利用CPLD芯片XC2C256-144控制LMX2306输出，与环路滤波器和压控振荡器共同构成锁相频合电路，设计实现了一400MHz 的正弦波输出。%Taking PLL chip LMX2306 as a core, we designed a Frequency Synthesizer Circuit which implements a 400MHz sine wave output by using CPLD chip XC2C256-144 controlled output to form a jointly phase-locked loop filter and voltage controlled oscillator. .