Title :
RSFQ logic arithmetic
Author :
Mukhanov, O.A. ; Rylov, S.V. ; Semonov, V.K. ; Vyshenskii, S.V.
Author_Institution :
Moscow State Univ., USSR
fDate :
3/1/1989 12:00:00 AM
Abstract :
Several ways to achieve local timing of Josephson-junction RSFQ (rapid single flux quantum) logic elements are proposed. Several examples of serial and parallel pipelined arithmetic blocks using various types of timing are suggested and their possible performance is discussed. Serial devices enable one to perform n-bit functions relatively slowly but using integrated circuits of a moderate integration scale, while parallel pipelined devices are more hardware-wasteful but promise extremely high productivity. The possible local and self-timing of RSFQ logic elements has been demonstrated, making it possible to construct digital blocks and complex devices operating at extremely high clock frequencies, limited only by logic delays of the RSFQ elements (~100 GHz for the present-day Nb technologies)
Keywords :
digital arithmetic; integrated logic circuits; pipeline processing; superconducting junction devices; superconducting logic circuits; 100 GHz; Josephson-junction; Nb technologies; RSFQ elements; RSFQ logic arithmetic; RSFQ logic elements; complex devices; digital blocks; high clock frequencies; local timing; logic delays; parallel pipelined arithmetic blocks; parallel pipelined devices; performance; rapid single flux quantum; self-timing; serial pipelined arithmetic blocks; types of timing; Arithmetic; Clocks; Frequency; Interferometers; Josephson junctions; Logic circuits; Logic devices; Niobium; Pulse circuits; Timing;
Journal_Title :
Magnetics, IEEE Transactions on
