DocumentCode :
1506776
Title :
Self-timing and vector processing in RSFQ digital circuit technology
Author :
Deng, Z.J. ; Yoshikawa, N. ; Whiteley, S.R. ; Van Duzer, T.
Volume :
9
Issue :
1
fYear :
1999
fDate :
3/1/1999 12:00:00 AM
Firstpage :
7
Lastpage :
17
Abstract :
As the operating speed of rapid single flux quantum (RSFQ) integrated circuits and systems increases, timing uncertainty from fabrication process variations makes global synchronization very hard. In this paper, the authors present a globally asynchronous, locally synchronous timing methodology for RSFQ digital design, which can solve the global synchronization problem. They also demonstrate the recent experimental results of some asynchronous circuits and systems implemented in RSFQ technology. Key components such as a self-timed shift register, a self-timed demultiplexor, a Muller-C element, a completion detector, and a clock generator have been designed and tested. High-speed operation has been confirmed up to 20 Gb/s for a prototype data buffer system, which consists of two self-timed shift registers and an on-chip 8-28-GHz clock generator.
Keywords :
asynchronous circuits; high-speed integrated circuits; multiplexing equipment; shift registers; superconducting logic circuits; synchronisation; timing; 20 Gbit/s; 8 to 28 GHz; Muller-C element; RSFQ digital circuit technology; asynchronous circuits; clock generator; completion detector; data buffer system; global synchronization; globally asynchronous timing methodology; high-speed operation; locally synchronous timing methodology; operating speed; rapid single flux quantum integrated circuits; self-timed demultiplexor; self-timed shift register; timing uncertainty; vector processing; Asynchronous circuits; Circuit testing; Clocks; Detectors; Digital circuits; Fabrication; Shift registers; Synchronization; Timing; Uncertainty;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.763250
Filename :
763250
Link To Document :
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