OPTICAL DIGITAL COMPARISON UNIT FOR EQUAL-TO, LESS-THAN, AND GREATER-THAN DETERMINATION

被引：4

作者：

MITKAS, PA ^{[1
]}

FELD, SA ^{[1
]}

BEYETTE, FR ^{[1
]}

WILMSEN, CW ^{[1
]}

机构：

[1] COLORADO STATE UNIV, DEPT ELECT ENGN, FT COLLINS, CO 80523 USA

来源：

APPLIED OPTICS | 1994年 / 33卷 / 05期

关键词：

OPTICAL DATA PROCESSING; OPTICAL COMPARATOR; OPTICAL COMPUTING; OPTICAL LOGIC GATES; OPTICAL GATE ARRAYS; SMART PIXELS;

D O I：

10.1364/AO.33.000806

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A number of nonnumerical processing applications, including database management, full text search, and pattern recognition rely heavily on digital comparisons. The development of massive-capacity optical memories coupled with the high speed and parallelism of optics have led to the investigation of optical techniques for nonnumerical processing. This paper proposes a system design for an optical comparator capable of performing multiple equal-to, less-than, and greater-than comparisons between pairs of binary words. The comparator consists of three two-dimensional arrays of optical elements based on a new optical logic device called the light-amplifying optical switch. The first two stages contain inverters, NOR gates, and flip-flops, while the third stage is a custom-designed winner-takes-all network. With a compact design and with small high-speed devices a comparator with 2.5 x 10(4) pixels could theoretically attain a processing rate of approximately 4 x 10(10) 16-bit word comparisons/s.

引用

页码：806 / 814

页数：9