This paper designed a cycle and number programmable pulse generator system with a SPLD device.First, it listed the requirements of the design and analyzed the various possible options according to the requirements.Then it described an ideal design in five parts,among which this paper presented a new method for the first time in achieving the 50% duty cycle in odd division.Finally,it did some test and summarized the system.It is a practical,low-cost and high-precision controllable pulse generator system;it then provides the related teachers with a good implementation case.%本文以一种 SPLD 器件为例,设计了一个周期和个数可控的脉冲发生系统.首先给出本设计的目标,并根据目标分析可行的各种方案,接着分四部分介绍了一种理想的实现方法,本文还首次提出了脉冲奇数分频中克服简单计数分频法无法实现 50%占空比的新方法.最后对该系统进行测试并总结,它是目前较为实用的低成本高精度的可控脉冲发生系统,它同时也为处于相关教学一线的老师提供了一个实施案例.
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