National Changhua University of Education Institutional Repository : Item 987654321/10259
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題名: STG-level decomposition and resynthesis of speed-independent circuits
作者: Chen, Ren-Der;Jou, Jer-Min
貢獻者: 資訊工程學系
關鍵詞: Hazard-free decomposition;Resynthesis;Signal transition graph (STG);Speed-independent (SI) circuit
日期: 2002-12
上傳時間: 2012-05-22T06:12:32Z
出版者: Institute of Electrical and Electronics Engineers
摘要: This paper presents a time-efficient method for the decomposition and resynthesis of speed-independent (SI) circuits. Given the specification of an SI circuit, our method first generates its standard C implementation. Then, the combinational decomposition is performed to decompose each high-fanin gate that does not exist in the gate library into some available low-fanin gates. The time efficiency of our method is achieved in two ways. First, the signal transition graph (STG), whose complexity is polynomial in the worst case, is adopted as our input specification. Second, to reduce the resynthesis cycles, which constitute a major part of the run time, our method first investigates the hazard-free decomposition of each high-fanin gate without adding any signals. Then, for those gates that cannot be decomposed hazard free, two signal-adding methods constructed at the STG level are developed for resynthesis. This decomposition and resynthesis process is iterated until all high-fanin gates are successfully decomposed or no solution can be found. Several experiments on asynchronous benchmarks show that our method largely reduces run time with only a little more area expense when compared with previous work.
關聯: IEEE Trans. Circuits & Systems, Part I, 49(12): 1751-1763
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