数字芯片溢出逻辑电路的设计与仿真研究

The Research On Circuit Designed For Processing Over-flow In Digital Chip

溢出逻辑现象是进行数字芯片电路设计时常会出现的一类现象,溢出现象会导致出现错误的运算结果,所以在电路设计时要重点考虑。如何正确得判断溢出现象是否产生及采取正确有效的手段来进行处理是本文主要讨论的问题。本文根据溢出产生的原理给出了解决溢出现象的算法,同时设计出对溢出现象能够正确进行处理的电路,并进行了仿真。T-SPICE仿真结果证明,该电路能正确得处理算术运算中出现的溢出现象。本文最后给出了一种溢出逻辑的改进电路设计。

The Over-flow will appear in the digital circuit design.How to detect and process the over-flow is the discussing issue.We will give an algorithm based on the over-flow theory.The simulation of the designed circuit by T-SPICE proves that the algorithm can correct the over-flow.In the end of the paper an improved design is discussed.