Title :
Rapid single-flux-quantum dual-rail logic for asynchronous circuits
Author :
Maezawa, M. ; Kurosawa, I. ; Aoyagi, M. ; Nakagawa, H. ; Kameda, Y. ; Nanya, T.
Author_Institution :
Electrotech. Lab., Ibaraki, Japan
fDate :
6/1/1997 12:00:00 AM
Abstract :
Dual-rail logic circuit elements based on rapid single-flux-quantum (RSFQ) technology have been designed and simulated. The proposed circuits can operate asynchronously, since dual-rail data include timing information in themselves. Therefore dual-rail logic scheme has a possibility of solving some problems of RSFQ circuits with flow clocking, which would become more serious as operating speed and complexity of the circuit increase. Implementation of RSFQ dual-rail AND and XOR cells is described. A scheme of transfer-ring data from a flow-clocked circuit to a parallel dual-rail circuit is also proposed, which a fully asynchronous dual-rail demultiplexer.
Keywords :
asynchronous circuits; demultiplexing; logic design; logic gates; superconducting logic circuits; timing; AND cells; RSFQ circuits; XOR cells; asynchronous circuits; dual-rail demultiplexer; dual-rail logic; flow-clocked circuit; parallel dual-rail circuit; rapid single-flux-quantum technology; timing information; transfer-ring data; Asynchronous circuits; Circuit simulation; Clocks; Delay estimation; Josephson junctions; Laboratories; Logic circuits; Propagation delay; Synchronization; Timing;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
