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Abstract:
The main focus of the program is the development of ultrafast superconductor devices and circuits based on the storage, transfer and processing of digital bits encoded by single quanta of magnetic flux. This approach offers several key advantages over other possible digital superconductor technologies, most importantly an extremely high operation speed. During the first period of the program, substantial progress in the development of these Rapid Single-Flux-Quantum (RSFQ) devices and circuits was achieved. In particular: ballistic transfer of SFQ signals over distances of up to 1 cm, and logic operation with very low error probability (below 10(exp -15)/ bit ) were demonstrated experimentally; a comprehensive library of RSFQ logic gates and auxiliary components were designed, optimized, and tested experimentally; several RSFQ circuits of modest integration scale (a few hundred Josephson junctions) were designed and successfully tested; a new fabrication technology featuring 1.5 micrometer high-jc Josephson junctions was developed and used to implement an RSFQ circuit operating at record speed (up to 370 GHz). Simultaneously, important improvements were made in design, fabrication, and testing capabilities. Also a group of some 12 undergraduate and graduate students have received substantial training in various aspects of superconductor electronics.
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Final rept. 15 Sep 92-14 Sep 96 |
| Pages: |
19 |
| Report Date: |
NOV 96 |
| Contract Number: |
F49620-93-1-0508 |
| Report Number: |
A036813 |
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