电子学报 ›› 2014, Vol. 42 ›› Issue (8): 1660-1664.DOI: 10.3969/j.issn.0372-2112.2014.08.032

• 科研通信 • 上一篇    

考虑信号相关性的逻辑电路可靠度计算方法

蔡烁1,2, 邝继顺1, 刘铁桥1, 王伟征2   

  1. 1. 湖南大学信息科学与工程学院, 湖南长沙 410082;
    2. 长沙理工大学计算机与通信工程学院, 湖南长沙 410004
  • 收稿日期:2013-08-30 修回日期:2013-12-02 出版日期:2014-08-25
    • 作者简介:
    • 蔡烁男,1982年出生,博士研究生,讲师,主要研究领域为数字电路测试、容错计算.E-mail:csustcs4002@163.com;邝继顺男,1959年生,博士,教授,博士生导师,主要研究领域为数字电路测试、容错计算、嵌入式系统.E-mail:jshkuang@hotmail.com
    • 基金资助:
    • 国家自然科学基金 (No.61303042,No.60773207)

Reliability Calculation Method of Logic Circuits Considering Signal Correlation

CAI Shuo1,2, KUANG Ji-shun1, LIU Tie-qiao1, WANG Wei-zheng2   

  1. 1. School of Information Science and Engineering, Hunan University, Changsha, Hunan 410082, China;
    2. School of Computer and Communication Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, China
  • Received:2013-08-30 Revised:2013-12-02 Online:2014-08-25 Published:2014-08-25
    • Supported by:
    • National Natural Science Foundation of China (No.61303042, No.60773207)

摘要:

随着集成电路特征尺寸不断缩小,软错误已经成为影响电路可靠性的关键因素.计算软错误影响下逻辑电路的信号概率能辅助评估电路的可靠性.引起逻辑电路信号概率计算复杂性的原因是电路中的扇出重汇聚结构,本文提出一种计算软错误影响下逻辑电路可靠度的方法,使用概率公式和多项式运算,对引发相关性问题的扇出源节点变量作降阶处理,再利用计算得到的输出信号概率评估电路可靠度.用LGSynth91基准电路、74系列电路和ISCAS85基准电路为对象进行实验,结果表明所提方法准确有效.

关键词: 软错误, 信号相关性, 扇出重汇聚, 降阶, 条件概率

Abstract:

As the feature size of integrated circuits shrinks,soft errors become the key factor influencing circuit reliability.Calculation of signal probability of logic circuits affected by soft errors can assist us in evaluating the circuit reliability.The reconvergent fanouts in circuits increase computational complexity of signal probability.A reliability calculation method of logic circuits is proposed in this paper.The method uses the probability formula and polynomial arithmetic,then the fanout source variables which trigger signal correlation are reduced.Based on this,the circuit reliability can be evaluated by the output signal probability.Experimental results on LGSynth91,74X series and ISCAS85 benchmark circuits show that our method is accurate and efficient.

Key words: soft error, signal correlation, fanout reconvergent, reduce order, conditional probability

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