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:
Dec. 30, 2008
Filed:
May. 27, 2003
Kei Yamada, Tokyo, JP;
Kei Yamada, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
In a circuit which adds a partial product {Σ(Aj*B)*2^j (j=0, . . . , m−1)} to a provisional remainder u by using a value of inferior m bits (m is an integer not less than 2) of a number to be multiplied A and a multiplier factor B, there is provided a multiplication remainder calculator which shifts inferior m bits of a provisional remainder u by continuously connecting m stages of processing circuits which perform addition of a modulus N and one-bit shift, and calculates a Montgomery product of the number to be multiplied A and the multiplier factor B by repeating this processing, wherein a multiple number of the multiplier factor can be calculated by inhibiting one-bit shift of the processing circuits.