用卡诺图判断与清除组合电路的竞争冒险

Discussion of the Teaching Method of " Electric Machine and Drag "

由于不同的门电路有着不同的延迟时间,组合电路会产生竞争,竞争容易引起电路的冒险。冒险可能使电路产生暂时或永久的逻辑错误,在设计电路时必须避免。在理论上,教科书中介绍利用“代数法”来判断和清除竞争冒险。结合笔者的教学实践,本文介绍更简单更易操作的卡诺图法来判断和清除竞争冒险。

Because different door circuits have different time of delaying, combining circuits will compete,which is apt to cause the risk of the circuit. That may make circuit produce temporary and permanent logic mistake. This must be avoid at the time of designing the circuit. In theory, textbooks recommend ' law of algebra' to judge and remove competition and risks. Combining the teaching practice of the author, this paper introduce Karnaugh Map, a simple law easy to use , judge and remove competitive risks.