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:
Sep. 27, 2011
Filed:
Aug. 10, 2007
Vincent Dupaquis, Biver, FR;
Russell Hobson, Glasgow, GB;
Vincent Dupaquis, Biver, FR;
Russell Hobson, Glasgow, GB;
Inside Contactless S.A., Aix-en-Provence, FR;
Abstract
Methods, apparatus and systems for large number multiplication. A multiplication circuit is provided to compute the product of two operands (A and B), at least one of which is wider than a width associated with the multiplication circuit. Each of the operands includes contiguous ordered word-wide operand segments (Aand B) characterized by specific weights j (integer from 0 to k) and i (integer from 0 to m). The multiplication circuit executes a matrix of word-wide operand segment pair multiplication operations. Multiplication operations are performed on a pair of rows at one time. For each pair of rows, a pair of corresponding Bword-wide operand segments are read from a memory and word-wide operand segment pair multiplication operations (A*B) are iteratively performed for each of k+2 columns. For each column a maximum of two additional memory read operations and one memory write operation is required.