The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 11, 1997
Filed:
Sep. 14, 1994
Munehiro Uratani, Yamatokoriyama, JP;
Aoi Kitaura, Tenri, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The absolute difference calculation circuits 101 through 10N each consisting of a subtractor which calculates the difference of two numbers each consisting of i bits and a bit inversion selector circuit which-provides the result of subtraction as it is when no borrow output is produced by the subtractor, and inverts every bit of the result of subtraction when there is a borrow output, to obtain 1's complement of the absolute value of difference. The multiple input adder 2 receives the borrow as input to the least significant bit thereof and adds the result of each absolute difference calculation circuit. Because the adding operations to obtain 2's complement in the absolute difference calculation circuit are carried out together in the multiple input adder that follows, number of adders required to calculate the absolute value of difference can be greatly reduced and the amount of entire circuitry can be greatly reduced.