NDLI: Demonstration of a single-flux-quantum microprocessor using passive transmission lines

Content Provider	IEEE Xplore Digital Library
Author	Tanaka, M. Kondo, T. Nakajima, N. Kawamoto, T. Yamanashi, Y. Kamiya, Y. Akimoto, A. Fujimaki, A. Hayakawa, H. Yoshikawa, N. Terai, H. Hashimoto, Y. Yorozu, S.
Copyright Year	2002
Abstract	We have successfully demonstrated an 8-bit microprocessor using passive transmission lines based on single-flux-quantum LSI technology. In the microprocessor designed here, called CORE1/spl alpha/6, a simple bit-serial architecture with seven instructions was employed. In the CORE1/spl alpha/6, the floor plan was designed with consideration toward integration of a memory, and superconductive passive transmission lines (PTLs) were used to connect circuit blocks. Utilization of PTLs helped us reduce the propagation delay in long interconnections. The design flexibility of the floor plan was enhanced and the performance of the microprocessor was improved by 20% compared with our previous design. The CORE1/spl alpha/6 was composed of 6319 Josephson junctions and 15 PTLs with power consumption of 2.1 mW. We have confirmed the complete operations of the CORE1/spl alpha/6 by on-chip high-speed tests. The maximum clock frequencies for bit operation and instruction execution have been found to be 18 GHz and 1.2 GHz, respectively, where the performance corresponds to 240 million instructions per second (MIPS).
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	400
Ending Page	404
Page Count	5
File Size	721270
File Format	PDF
ISSN	10518223
Volume Number	15
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microprocessors Transmission lines Power transmission lines Superconducting transmission lines Distributed parameter circuits Large scale integration Superconductivity Propagation delay Integrated circuit interconnections Josephson junctions single flux quantum (SFQ) logic Microprocessor passive transmission line
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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