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. 29, 2003
Filed:
Jun. 08, 2001
Hiroki Morimura, Kanagawa, JP;
Satoshi Shigematsu, Kanagawa, JP;
Katsuyuki Machida, Kanagawa, JP;
Hakaru Kyuragi, Tokyo, JP;
Toshishige Shimamura, Kanagawa, JP;
Abstract
A small shape recognizing capacitive sensor device includes detection elements, sensor circuits, and a correction circuit. The detection elements are arranged adjacent to each other. The sensor circuits are connected to the detection elements, respectively. The correction circuit corrects the output signal level of the sensor circuit. The output signal level correction circuit includes a calibration circuit, calibration reference signal generation circuit, and comparison circuit. The calibration circuit is connected to the output side of the sensor circuit. The calibration reference signal generation circuit generates a calibration reference signal. The comparison circuit compares the output from the sensor circuit with the calibration reference signal and supplies the difference output to the calibration circuit as a control signal. The calibration circuit corrects the level of the sensor circuit output on the basis of the control signal such that the difference between the output from the sensor circuit and the calibration reference signal becomes zero.