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The Design of a Fault一Tolerant A/D,D/A Converter with High Reliability

Wang,Ying一li; Yang,Shi一yuan; Tong,Shi一bai(Automation Department, Tsinghua University, 100084)  
Abstract This paper presents the structure and principle of a new A/D,D/A fault一tolerant interface board. The design of comparator and fault一detector on this board isvery simple because it is based on the mutual relationship between A/D converter and D/Aconverter. This fault一tolerant interface can be used in the same way as ordinary A/D,D/Ainterface with very little change in software,Besides,this board can also be used in non一fauIt一tolerant operation without any resources on the board wasted.Finally,this paperproves the reliability of this board is higher than orainary ones by estimating through relia-bility model.
【CateGory Index】: TP335
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