An atom-switch-based field-programmable gate array with optimized driving capability buffer. (4th February 2019)

• Record Type: Journal Article
• Authors: Bai, Xu; Miyamura, Makoto; Nebashi, Ryusuke; Morioka, Ayuka; Banno, Naoki; Okamoto, Koichiro; Numata, Hideaki; Hada, Hiromitsu; Sugibayashi, Tadahiko; Sakamoto, Toshitsugu; Tada, Munehiro
• Is Part Of: Japanese journal of applied physics. Volume 58:Number SB(2019)
• Publication Date: 2019-02-04
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/1347-4065/aaf899
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: An atom-switch field-programmable gate array (AS-FPGA) uses a simple crossbar switch structure for signal routing. An AS-crossbar switch enables a shorter delay thanks to single-stage routing and the low capacitance of the AS, unlike a routing block which uses multi-stage multiplexers in a conventional static random access memory FPGA. However, the output of a crossbar switch has a variable load capacitance for different fan-outs when the application circuit is mapped on an AS-FPGA. The buffer driving capability for the crossbar switch needs to be carefully designed since there is a trade-off relationship between energy and delay. An optimized buffer reduces the energy–delay product (EDP) of the AS-crossbar switch by 22.3% compared with a non-optimized buffer.