J. Phys. IV France
Volume 12, Numéro 3, May 2002
Page(s) 157 - 160

J. Phys. IV France
12 (2002) Pr3-157
DOI: 10.1051/jp420020058

A 20-GHz FLUX-1 superconductor RSFQ microprocessor

M. Dorojevets

State University of New York, Department of Electrical and Computer Engineering, Stony Brook, NY 11794-2350, U.S.A.

The first single-chip superconductor FLUX-1 microprocessor prototype with a target clock frequency of 17-20 GHz has been designed in the Rapid Single Flux Quantum (RSFQ) logic and fabricated using lowtemperature 4 kA/cm 2, 1.75- $\mu$m Nb/AlOx/Nb Josephson junction technology. A FLUX-1 chip represents an 8-bit deeply pipelined microprocessor with a new parallel partitioned architecture that has been developed to tolerate interconnect delays and fill long FLUX-1 pipelines with operations. A FLUX-1 chip contains 65,759 Josephson junctions on a ${\rm 10.6\,mm \times 13.2\,mm}$ die with flip-chip packaging. First FLUX-1 chips fabricated in 2001 are currently under testing at TRW.

© EDP Sciences 2002