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:
Jun. 12, 1990
Filed:
May. 24, 1989
Applicant:
Inventor:
David L Simpson, West Columbia, SC (US);
Assignee:
NCR Corporation, Dayton, OH (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364768 ;
Abstract
The subject invention is a circuit and method of providing the sum of first and second n bit binary numbers having a difference of one or less. The method comprises combining the least significant bits of the numbers in a first coincidence gate to provide the least significant bit of the sum, combining the nth and (n-1)st bits of the numbers in a first logic network to provide the most significant bit of the sum, and combining solely the ith and (i-1)st bits of the numbers in an ith logic network to provide the ith bit of the sum, for all values of i where 1<i<n+1.