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. 26, 2011
Filed:
Sep. 28, 2005
Hisashi Inaba, Kariya, JP;
Rikuo Hatano, Toyota, JP;
Eiji Mushiake, Chita-gun, JP;
Masahiro Hagimoto, Anjo, JP;
Hisashi Inaba, Kariya, JP;
Rikuo Hatano, Toyota, JP;
Eiji Mushiake, Chita-gun, JP;
Masahiro Hagimoto, Anjo, JP;
Aisin Seiki Kabushiki Kaisha, Kariya-Shi, Aichi-Ken, JP;
Abstract
A transmitter portionincludes a control circuit, a driver circuit, and a wave detector circuit. The control circuitgenerates control signals Vp, Vn based on a pulsed transmission signal So. The driver circuit, which is supplied with a battery voltage Vb, generates an output signal Sa to be sent to an antennabased on the control signals Vp, Vn. The wave detector circuitoutputs a detection signal Sk having a voltage proportional to the level of the output signal Sa (transmission power level). The control circuitchanges the pulse widths of the control signals Vp, Vn based on the voltage level of the detection signal Sk. As a result, electric power consumption is reduced and enlargement of an apparatus is suppressed while maintaining the transmission power level constant.