Accession Number : ADD014176

Title :   Optical Arithmetic Logic Using the Modified Signed-Digit Redundant Number Representation.

Descriptive Note : Patent, Filed 29 Dec 86, patented 13 Jun 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Lasher, Mark E ; Bocker, Richard P ; Drake, Barry L ; Henderson, Thomas B

Report Date : 13 Jun 1989

Pagination or Media Count : 21

Abstract : Optical architectures are presented for performing fully parallel, carry-free computation with a trinary, modified signal-digit number representation to allow addition, subtraction and multiplication. Two different optical schemes involving position and polarization encoding enable the fabrication of modular trinary logic systems that accommodate trinary numbers of different magnitudes. The optical systems made up of redundant three-dimensional modules provide a designer with latitude to simultaneously carry out addition, subtraction or multiplication optically and with reduced complexity. Patents. (JHD)

Descriptors :   *COMPUTER ARCHITECTURE, *COMPUTER LOGIC, *OPTICAL CIRCUITS, *PATENTS, ARITHMETIC, CODING, LATITUDE, OPTICAL EQUIPMENT, POLARIZATION, PARALLEL PROCESSORS

Subject Categories : Cybernetics
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE