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. 06, 2010
Filed:
Mar. 25, 2008
Shoji Yamada, Nagoya, JP;
Haruhisa Takayama, Nagoya, JP;
Shoji Yamada, Nagoya, JP;
Haruhisa Takayama, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
The present invention provides a drive circuit for driving a capacitive electromechanical transducer device. The capacitive electromechanical transducer device is constituted of two electromechanical transducer parts consisting of a first capacitive electromechanical transducer part and a second capacitive electromechanical transducer part and is operated in response to two-phase sinusoidal signals having mutually opposite phases. The drive circuit includes an inductor which resonates with the first electromechanical transducer part and the second electromechanical transducer part, and a resonance frequency of the resonance circuit is set substantially equal to an operation frequency of the electromechanical transducer device.