本文根据CTC的定时功能,分析了几种脉冲代码触发器方案,它们具有调正灵活、适应性强、节省大量硬件电路等优点。为了叙述的方便,首先简述一下触发角、控制电压与CTC定时的关系。并本着逐步“硬件软化”的顺序来分析,重点是直流触发,最后介绍变频触发。 According to the timing function of CTC, this paper analyzes several pulse code trigger scheme, which has the advantages of flexible adjustment, strong adaptability, saving a large number of hardware circuits. For the convenience of narration, the trigger angle and the relationship between control voltage and CTC timing are briefly described. And in the progressive “hardware softening” order to analyze, the key is to trigger DC, and finally introduce the frequency trigger.