Invention Grant
US08526066B2 Analog processing circuit, analog integrated circuit device, image reading device, and image forming apparatus
有权
模拟处理电路，模拟集成电路装置，图像读取装置和图像形成装置
- Patent Title: Analog processing circuit, analog integrated circuit device, image reading device, and image forming apparatus
- Patent Title (中): 模拟处理电路，模拟集成电路装置，图像读取装置和图像形成装置
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Application No.: US12099508Application Date: 2008-04-08
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Publication No.: US08526066B2Publication Date: 2013-09-03
- Inventor: Masamoto Nakazawa , Tohru Kanno
- Applicant: Masamoto Nakazawa , Tohru Kanno
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2007-107133 20070416
- Main IPC: H04N1/40
- IPC: H04N1/40
Abstract:
A first clamping unit clamps a base voltage of an input image signal to a predetermined reference voltage. A sampling-and-holding unit samples and holds the image signal after clamping or a reference signal that becomes the base voltage of the image signal. An amplifying unit amplifies the image signal sampled and held by the sampling-and-holding unit. An analog-to-digital converting unit converts the image signal after amplification into a digital image signal. A second clamping unit clamps the reference signal to a predetermined voltage.
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