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. 27, 1997
Filed:
May. 08, 1995
Takashi Taniguchi, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An apparatus uses a sticky digit in rounding an interim solution Yr into a final approximate solution Ye for an infinite precise solution Y, determined by a function F according to Y=F(X) with respect to digital data X. The apparatus includes a partial product generator receiving a multiplicand and a multiplier, at least one of which represents an interim solution Yr, for generating a plurality of partial products; a sign inversion generator for generating a sign inversion value, expressed in the same format as the partial products, from at least a lower part of a subtrahend to enable place matching, where the subtrahend represents the digital data X; an adder for adding the partial products and the sign inversion value; a detector which, in response to the addition result, detects whether the subtrahend or a product of the multiplicand and multiplier is greater; and a sticky digit generator for generating the sticky digit in response to the detection result.