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:
Apr. 23, 2019
Filed:
Jul. 09, 2015
Dexerials Corporation, Tokyo, JP;
Masayoshi Kanno, Tokyo, JP;
Dexerials Corporation, Tokyo, JP;
Abstract
A non-contact communication apparatusincludes an antenna resonant unitand an antenna drive unit. In the antenna drive unit, for example, a measurement unit consisting of an differential amplifier Ameasures an output current from an oscillation unit. A control unitdetects a minimum value or maximum value of the output current. The resonant frequency is controlled by the use of an optimal control value corresponding to the minimum value or maximum value. Therefore, even if the resonant frequency fluctuates due to variations in antenna characteristics in manufacture or a usage environment or aging, satisfactory communication characteristics at a set resonant frequency can be obtained.