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New Data Encoding Method with a Multi-Value Logic for Low Power Asynchronous Circuit Design

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3 Author(s)
Eun-Ju Choi ; Chungbuk Nat’l University ; Kyoung-Rok Cho ; Je-Hoon Lee

This paper presents an asynchronous encoding scheme using a MVL(Multi-Value Logic). This scheme reduces not only the number of wires but also the switching activities. It is achieved by the two proposed data encoding methods, RT/NRT(Return to Ternary/ Non Return to Ternary) encoding and hybrid ternary one. Conventional ternary encoding makes all data lines to intermediate to generate completion signal. In RT/NRT encoding, however, data lines with transferring zero do not change to intermediate value in order to reduce the switching activities. In hybrid ternary encoding, it needs only two half-swing to transfer 2-bit data. Indeed, it only needs two lines. As the results, a RT/NRT encoding shows 25% reduction in the signal transition and it achieve power reduction about 27% comparing to the conventional ternary one. In addition, a hybrid ternary encoding achieves 23% energy reduction.

Published in:

Multiple-Valued Logic, 2006. ISMVL 2006. 36th International Symposium on

Date of Conference:

17-20 May 2006