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:
Dec. 19, 1995
Filed:
Jul. 09, 1993
Shigeto Inui, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A carry look ahead addition device includes a carry generation/propagation term generator which receives input of two numbers each having a length of n (positive integer) bits and generates the carry generation term and the carry propagation term for each bit, a carry generator which generates a carry for each bit based on the carry input and the carry generation term and the carry propagation term from the carry generation/propagation term generator, and a sum generator. The carry generator receives the carry input and, at the same time, the carry generation term and the carry propagation term are generated at the carry generation/propagation term generator. The carry generator deems the carry input as the carry generation term at the bit immediately below the least significant bit (Bit -1) and the carry propagation term at the Bit -1 to be 0 for processing without a carry input for n+1 bits so as to generate a carry having a length of n+1 bits.