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:
Jan. 26, 1988
Filed:
Apr. 25, 1985
Ichiro Kuroda, Tokyo, JP;
Takao Nishitani, Tokyo, JP;
Hideo Tanaka, Tokyo, JP;
Yuichi Kawakami, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A double precision multiplyer for performing the multiplication of two double precision data using a 2's complement single precision multiplier. The 2n-1 bit double precision data is divided into one single precision data formed by taking the upper n bits of the double precision data and another single precision data formed by adding a '0' bit before the most significant bit of the remaining n-1 bits of the double precision data. Apparatus for performing the double precision multiplication thereby eliminates the necessity of discriminating the sign bit and enhances the speed of the double precision multiplication.