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. 02, 2008
Filed:
Jan. 22, 2003
Sumio Morioka, Yamato, JP;
Akashi Satoh, Yamato, JP;
Gang Zhang, Yanato, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
To provide a high-speed combinational circuit including an S-Box and a method for creating an RO-BDD that defines a configuration of the combinational circuit. The combinational circuit includes a number of independent selector groups for each generating an output bit separately, the number corresponding to number of the output bits, and a driver chain for supplying a primary input to each of the selector groups, in which each of the selector groups includes a plurality of selectors connected to each other to form a number of stages, the number of stages being equal to or less than number of bits of the primary input, and a select signal for the selectors in each stage is driven by one primary input.