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对于多状态的異步时序电路,现有的状态编码方法都很复杂。本文提出了一种简单易行的状态卡诺图方法——一种状态分派的几何方法,以避免进行大量的代数运算。 为了实现状态卡诺图,本文提出了一种互锁触发器电路。此种电路特别适用于实现多输入多状志的状态图,并且容易避兔发生临界竞争。通过实现IEC—625—IB控者接口功能状态图,文中具体介绍了状志卡诺图及互锁触发器的应用。设计出的电路比已发表的电路明显地简单。
For multi-state asynchronous sequential circuits, the existing state coding methods are complex. In this paper, we propose a simple and easy state-based Carnot diagram method, a geometric method of state assignment, to avoid a large number of algebraic operations. In order to achieve the state diagram, this paper presents an interlocking flip-flop circuit. This kind of circuit is especially suitable for realizing the state diagram of multi-input state, and it is easy to avoid the critical competition. Through the realization of the IEC-625-IB controller interface functional status diagram, the article specifically describes the application of the ambush Karnaugh map and interlock trigger. The circuit designed is significantly simpler than the published circuit.