中文摘要：

借鉴生物系统中的简并性理论，对数字电路的简并性进行了定义，并利用生物鲁棒度概念和简并性的计算方法，实现了数字电路的简并度度量与鲁棒性计算，通过实验分析了简并度、覆盖率、关键节点与电路鲁棒度的关系。实验结果表明，在数字电路冗余结构中，简并度越高，覆盖率越大，关键节点比例越小，电路的鲁棒度越高。为数字电路可靠性设计提供了一种新的技术途径。

英文摘要：

The paper refers to the degeneracy theory in biology system,defines the digital circuit degeneracy and achieves the computation of digital circuit degeneracy and robustness with the concept of biological robustness and the computing method of degeneracy.The paper analyzes the relationship of degeneracy,cover rate,key nodes and digital circuit robustness via experiment.The result of experiment indicates that the higher degeneracy,the larger cover rate and the less the proportion of key nodes,the higher the digital circuit＇s robustness.The conclusion can provide a new technology approach for digital circuit reliability design.