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. 20, 1995
Filed:
Feb. 22, 1994
Yasuhiko Hagihara, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A multiplier circuit has a partial AND generating portion generating n in number of partial AND's as products of a multiplied value and respective bits of n-bit multiplying value, an intermediate sum generating portion inputting n in number of partial AND's, generating intermediate sums and reducing number of the intermediate sums progressively for finally outputting two intermediate sums, and an adder adding two intermediate sums output from the intermediate sum generating portions for outputting a product of multiplication of the multiplied value and the multiplying value. The intermediate sum generating portion has a plurality of intermediate sum calculating circuits, each of which has a plurality of adders of the type of four inputs and two outputs, connected in parallel, the intermediate sum calculating circuits are connected in a plurality of stages in a tree-like configuration.