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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Yoshikawa, N. Matsuzaki, F. Nakajima, N. Fujiwara, K. Yoda, K. Kawasaki, K. |
| Copyright Year | 2002 |
| Abstract | An eight-bit SFQ processor has been designed and some key components have been tested to confirm feasibility of the large-scale SFQ digital circuit. The designed processor is composed of a one-bit ALU, two eight-bit registers with local clock generators, an instruction register, a five-bit program counter, a state controller, and a 32-byte register file. A bit-serial architecture and a distributed local clock architecture, where each register has its own local clock generator, have been employed in order to increase the local clock frequency. The target clock frequency is 16 GHz and 10 GHz for the NEC 2.5 kA/cm/sup 2/ and Hypres 1 kA/cm/sup 2/ Nb processes. On the circuit design level, we have used a data-driven self-timed architecture and a binary decision diagram, which reduce the timing design difficulty in high frequency operation. The processor, which contains 7,300 Josephson junctions, has been designed by using a cell-based design methodology with the assistance of a top-down CAD environment. We have successfully tested some important circuit blocks, including a one-bit ALU, eight-bit registers, and a demultiplexer for register files. |
| Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
| Starting Page | 441 |
| Ending Page | 445 |
| Page Count | 5 |
| File Size | 1241468 |
| File Format | |
| ISSN | 10518223 |
| Volume Number | 13 |
| Issue Number | 2 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2003-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Registers Circuit testing Clocks Frequency Process design Large-scale systems Digital circuits Counting circuits National electric code Niobium |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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