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. 04, 2014
Filed:
Jul. 15, 2010
Kazuyuki Kobayashi, Midori, JP;
Tatsuya Suzuki, Kumagaya, JP;
Kumiko Fukai, Gunma, JP;
Yasuhiro Kaneta, Isesaki, JP;
Kazuyuki Kobayashi, Midori, JP;
Tatsuya Suzuki, Kumagaya, JP;
Kumiko Fukai, Gunma, JP;
Yasuhiro Kaneta, Isesaki, JP;
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Abstract
There is offered a signal processing circuit for an electrostatic capacity type touch sensor capable of detecting a larger number of locations with a smaller number of touch pads as well as improving noise immunity. A selection circuit selects either a signal from a combination of the first and second kinds of touch pads outputted through the first and second output terminals COand COin a touch panel or a signal from a combination of the third and fourth kinds of touch pads outputted through the third and fourth output terminals COand CO. An electric charge amplifier outputs first and second output voltages Vand Vcorresponding to a difference between capacitances of the touch pads on the touch panel based on the signals from the selected combination. A delta sigma type A/D converter converts the first and second output voltages Vand Vinto digital signals.