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:
May. 11, 1999
Filed:
Dec. 19, 1996
Applicant:
Inventor:
Yoshiki Tsujihashi, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
36475401 ;
Abstract
An extended 4-input 2-output addition block (1a) is provided, along with 4-input 2-output addition blocks (2a to 2c), in the first stage of a tree circuit. Further, 4-input 2-output addition blocks (2d and 2e) are provided in the second stage and a 4-input 2-output addition block (2f) is provided in the third stage. Input signals of the addition blocks in the same stage arrive at the same time and the number of logical stages in a critical path of the tree circuit is reduced. Thus, parallel operation of the circuit is improved, to thereby ensure higher-speed operation of a multiplier.