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. 14, 2010
Filed:
Apr. 12, 2005
George Nakane, Nara, JP;
Tatsumi Sumi, Osaka, JP;
George Nakane, Nara, JP;
Tatsumi Sumi, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention extends the reading range between a contactless type information medium (semiconductor integrated circuit) and a reader/writer, which exchanges data in contactless communications with the contactless type information medium, and enables a stable data exchange even if the power supply voltage is lowered when data is returned from the contactless type information medium to the reader/writer. Specifically, when data is returned from the contactless type information medium, the data to be returned is held in the logic circuit sectioncapable of operating at a lower voltage than the non-volatile memory circuit section, and the reset detection lower limit voltage to be used by the reset generating circuitduring the data-returning period is set to be lower than that during periods other than the data-returning period.