发明授权
- 专利标题: Imaging signal processing methods and apparatus
- 专利标题(中): 成像信号处理方法和装置
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申请号: US12141542申请日: 2008-06-18
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公开(公告)号: US08072525B1公开(公告)日: 2011-12-06
- 发明人: Bryan D. Ackland , Paul W. Latham, II , Joshua C. Park
- 申请人: Bryan D. Ackland , Paul W. Latham, II , Joshua C. Park
- 申请人地址: US AZ Tucson
- 专利权人: Infrared Newco, Inc.
- 当前专利权人: Infrared Newco, Inc.
- 当前专利权人地址: US AZ Tucson
- 代理机构: Wolf, Greenfield & Sacks, P.C.
- 主分类号: H04N5/335
- IPC分类号: H04N5/335
摘要:
Methods and apparatus are provided for performing multiple correlated double sampling (CDS) operations on an imaging pixel, and in some cases on an array of imaging pixels, during a single integration cycle of the pixel(s). The multiple CDS operations may produce multiple CDS values, which may be processed in combination to produce a resulting value substantially free of various types of noise. The CDS operations may be performed using a CDS circuit including a single-ended charge amplifier having an input capacitor. The charge amplifier may also include a variable capacitance providing a variable gain. The variable capacitance may be provided by a feedback capacitor.