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:
Sep. 08, 2015
Filed:
Sep. 08, 2011
Yuuya Miyoshi, Osaka, JP;
Tohru Kanno, Kanagawa, JP;
Yuuya Miyoshi, Osaka, JP;
Tohru Kanno, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A signal processing circuitincludes a clock circuitwhich generates a clock signal which has been subjected to spread spectrum modulation and supplies the clock signal to a photoelectric conversion element; a AD converterwhich performs AD conversion on an image signal obtained by the photoelectric conversion element; a noise detecting circuitwhich detects a noise amplitude of a noise signal that is caused by the spread spectrum modulation of the clock signal and is included in the image signal which has been AD converted; and an analog correction circuitand an digital correction circuitthat calculate a correction factor based on the noise amplitude, generate a correction signal by multiplying the digital modulation signal by the correction factor, and superimpose the correction signal onto the image signal at an input side or an output side of the AD converter.