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:
Mar. 21, 2017
Filed:
Mar. 18, 2014
Seiko Epson Corporation, Tokyo, JP;
Katsuhiko Maki, Chino, JP;
Takashi Kurashina, Matsumoto, JP;
Seiko Epson Corporation, , JP;
Abstract
A detection device includes a driving circuit and a detection circuit. The detection circuit includes first and second electric charge-voltage conversion circuits to which first and second detection signals are input, first and second gain adjustment amplifiers that amplify output signals of the circuits, a switching mixer that has first and second input nodes to which the output signals of the first and second gain adjustment amplifiers are input, and performs differential synchronous detection thereon on the basis of a synchronization signal from the driving circuit, so as to output first and second output signals to first and second output nodes, first and second filters that receive the first and second output signals from the first and second output nodes of the switching mixer, and an A/D conversion circuit that receives output signals from the first and second filters so as to perform differential A/D conversion thereon.