基于信号行为的二值组合电路冒险检测

Hazard detection for binary combinational circuits based on signal behavior

数字电路中的冒险现象不仅会导致电路的误操作,而且消耗了能量、增加了操作时间,因此在电路设计中冒险的检测非常重要.文章介绍了信号行为四值模型的基本概念,并进一步提出了基于信号行为四值逻辑的二值组合电路冒险检测方法.此方法与传统的冒险检测方法相比更直接,而且可以同时检测出电路的静态冒险和动态冒险.

Hazards pulses are undesirable short pulses in digital circuits, it is mainly caused by transmission delays of circuit elements. Such pulses may not only cause errors in the circuit operation, but also consume power and increase the computation time. It is. therefore, very important to detect hazards in circuit designs. By introducing the four-- valued mode of signal behavior, this paper analysed the propagation operations of signal＇s multiple-- valued behavior while passing through the basic gates, then the method of hazard detection for binary combinational circuits which is based on signal behavior was proposed. In comparison with the traditional method of hazard detection, this method has advantages of its directness and being capable of detecting both static hazards and dynamic hazards.