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:
Oct. 18, 2011
Filed:
Feb. 23, 2007
Takashi Osada, Kofu, JP;
Takashi Osada, Kofu, JP;
NEC Computer Techno, Ltd., Yamanashi, JP;
Abstract
A multiplier has a multiplication array in which partial products are generated by performing multiplication between a multiplier and a multiplicand, and a partial product control circuit which generates an enable signal for activating an effective region in the multiplication array corresponding to effective figures of the multiplier and the multiplicand. The effective figures depend on the format of the multiplier and the multiplicand. The partial product control circuit controls the status of the enable signal according to a multiplication command designating the format. The multiplication array is constituted by a dynamic circuit. The dynamic circuit in an initial stage of the multiplication array has a switch which is turned on/off by the enable signal. When the enable signal is ineffective, the switch is turned off and a discharging operation in the dynamic circuit is stopped.