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. 06, 2011
Filed:
May. 19, 2008
Shinobu Fujita, Kanagawa-ken, JP;
Tetsuro Iwamura, Kanagawa-ken, JP;
Shinobu Fujita, Kanagawa-ken, JP;
Tetsuro Iwamura, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A random number generating circuit comprises: the seed generating circuit which generates a seed; and a pseudo random number circuit which generates pseudo random numbers based on the seed generated by the seed generating circuit. The seed generating circuit has: an oscillating circuit which oscillates continuously or intermittently, and which outputs a digital data sequence; a smoothing circuit which outputs time series data by controlling appearance frequencies of '0' and '1' in the digital data sequence outputted from the oscillating circuit; and a postprocessing circuit which generates one-bit seed by a computation using a plurality of bits included in the time series data.