本刊今年第三期《自动取包机电路基础》一文介绍的取包机电路中,采用了射极耦合双稳态触发器对键控信号整形。射极耦合双稳态触发器是怎样工作的?它有哪些特点?怎样设计和调试?本文就上述问题作一简单介绍。电路的组成和特点射极耦合双稳态触发器的典型电路如图1所示。它是由两级晶体管反相器组成的。第一 This issue of the third issue of this year, “automatic charter-based circuit foundations,” a paper introduced charter circuit, the use of emitter-coupled flip-flop flip-key signal shaping. Emitter-coupled bistable flip-flop is how to work? What are its characteristics? How to design and debug? This article on the issue to make a brief introduction. Circuit Components and Features The typical circuit of an emitter-coupled flip-flop is shown in Figure 1. It consists of a two-stage transistor inverter. the first