摘要
针对锁相环技术频率合成器的教学实验演示,采用间接式频率合成技术,结合锁相环技术以及CPLD技术等相关技术,设计了一种新的实用型频率合成器。本文所设计的电路,通过键盘输入,数码管实时显示,方便直观地演示了频率合成器,达到了预期的要求和效果。与以前设计的电路相比较,在性能指标、用于演示的直观性和可操作性方面都有了一定的提高,它不仅可以用于教学实验演示,还可以用作频率源、频率计等。
Aiming at the phase-locked loop technology frequency synthesizer＇s teaching experiment ,by using indirect frequency synthetic technique, combined with PLL technology, CPLD technology and other related technologies, this article designs a kind of new practical frequency synthesizer. This paper designed a system which demonstrates frequency synthesizer intuitively and easily through the keyboard input and the digital real-time display, and it achieves the expected requirements and results . Compared to the previous design of the system, the performance indicators, demonstration for the visual and operational aspects are increased. It not only can be used in the demonstration of teaching experiment, but also can be used as frequency source, frequency meter and so on.
关键词
锁相环
频率合成器
CPLD
phase-locked loop（PLL）
frequency synthesizer
complex programmable logic device
