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:
Nov. 19, 2013
Filed:
Oct. 08, 2008
Kazuto Yamauchi, Okazaki, JP;
Yasunori Murayama, Ichinomiya, JP;
Sadahiko Tanaka, Okazaki, JP;
Keitaro Takizawa, Okazaki, JP;
Kouichi Yamanoue, Yokohama, JP;
Kazuto Yamauchi, Okazaki, JP;
Yasunori Murayama, Ichinomiya, JP;
Sadahiko Tanaka, Okazaki, JP;
Keitaro Takizawa, Okazaki, JP;
Kouichi Yamanoue, Yokohama, JP;
Mitsubishi Jidosha Kogyo Kabushiki Kaisha, Tokyo, JP;
Visteon Japan, Ltd., Yokohama-Shi, JP;
Abstract
A detection circuitincludes: an input unit; two contact electrodes A and B which are connected to the input unit; phase inversion unitconnected to the contact electrode A; one amplification unitarranged in each contact unit; and detection unitsA andB which detect as an electric change amount, an amplitude change of an input signal caused by a capacitance change in each of the contact electrodes A and B. The detection circuitcauses the two electrodes to input signals having phases shifted by a half period from each other by using the phase inversion unit. In the presence of contact, the amplitude of the input pulses is amplified by the one amplification unit. The respective detection unitsA andB detect signals of respective electrodes from the one amplified signal and output them to output unitsA andB, respectively.