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:
Aug. 06, 1985
Filed:
Oct. 21, 1981
Applicant:
Inventors:
Masahito Kobayashi, Yokohama, JP;
Narimichi Maeda, Tachikawa, JP;
Yoshimune Hagiwara, Kodaira, JP;
Takashi Akazawa, Kodaira, JP;
Shizuo Sugiyama, Kodaira, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Denshi Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
364748 ; 364745 ;
Abstract
According to the present invention, a normalized floating point type multiplier circuit including a multiplier for mantissa's multiplication and an adder for exponent's addition is equipped with both a detector circuit for detecting over- and under-flows and a compensation circuit for compensating the output of said multiplier without any programming, when the over- and under-flows are detected, so that the multiplying speed can be improved.