An Operand Routing Network for an SFQ Reconfigurable Data-Paths Processor

Author

Kataeva, Irina ; Akaike, Hiroyuki ; Fujimaki, Akira ; Yoshikawa, Nobuyuki ; Takagi, Naofumi ; Inoue, Koji ; Honda, Hiroaki ; Murakami, Kazuaki

Author_Institution

Dept. of Quantum Eng., Nagoya Univ., Nagoya, Japan

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

665

Lastpage

669

Abstract

We report the progress in the development of an operand routing network (ORN) for an SFQ reconfigurable data-paths processor (SFQ-RDP). The SFQ-RDP is implemented as a two-dimensional array of floating-point units (FPU), outputs of which can be connected to the inputs of one or more FPUs in the next row via ORN. We have considered two architectures of the ORN: one is based on NDRO switches and the other - on crossbar switches. The comparison shows that the crossbar-based ORN has better performance due to the regular pipelined structure. We have designed a crossbar switch with a multicasting function and a 1-to-2 ORN prototype for 2.5 kA/cm² process. The circuits have been experimentally tested at the frequencies up to 36 GHz.

Keywords

floating point arithmetic; microprocessor chips; network routing; SFQ reconfigurable data-paths processor; crossbar switches; floating-point units; multicasting function; operand routing network; Operand routing network; RSFQ; reconfigurable data-paths processor;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018534

Filename

5153045