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A syntax-directed translation for the synthesis of delay-insensitive circuits

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2 Author(s)
Leung, S.C. ; Dept. of Comput. Sci., Concordia Univ., Montreal, Que., Canada ; Li, H.F.

A syntax-directed translation procedure for the synthesis of delay-insensitive circuits from graph-theoretic specifications is presented. No isochronic fork assumption is required for the correct operation of the synthesized circuits. The synthesized circuits are different from those obtained from Ebergen's synthesis method. In Ebergen's circuits, the voltage levels of a set of wires are used to encode which input events are most recently received. Special circuit elements (the N-element or the RCEL element) and two-phase to four-phase converters are needed to change the voltage levels of the encoding wires when input events are received. In the circuits obtained from the method in this paper, the wires encoding which input events are most recently received are the outputs of the toggles. When input events are received, they are sent directly or via demultiplexers to the toggles to change the voltage levels at their outputs. Two-phase to four-phase converters are not needed. The synthesis method is compared with Ebergen's synthesis method.<>

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Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:2 ,  Issue: 2 )