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公开(公告)号：US20200336681A1
公开(公告)日：2020-10-22
申请号：US16844365
申请日：2020-04-09
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse , Kentaro Tsukida , Takanori Yamashita , Daisuke Kobayashi , Kazuho Tsukui
Abstract: In order to provide an imaging device that includes an amplifier performing amplification with a plurality of gains for each signal from a pixel unit and can further reduce a noise component, an imaging device included in an imaging apparatus has the pixel unit in which unit pixels are arranged in a matrix and generates a signal voltage by photoelectric conversion. A column amplifier can amplify a photoelectrically converted signal with a plurality of gains. After an amplified signal is subjected to analog/digital conversion by a column ADC, a signal processing circuit subtracts a noise signal from a pixel signal. A noise signal read out after resetting a floating diffusion section included in the pixel unit and a pixel signal read out immediately thereafter are acquired by being multiplied by a first gain, and a pixel signal read out thereafter is acquired by being multiplied by a second gain. The first gain is set to a value larger than the second gain.
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公开(公告)号：US11165978B2
公开(公告)日：2021-11-02
申请号：US16844365
申请日：2020-04-09
Applicant: CANON KABUSHIKI KAISHA
Inventor： Takenori Kobuse , Kentaro Tsukida , Takanori Yamashita , Daisuke Kobayashi , Kazuho Tsukui
Abstract: In order to provide an imaging device that includes an amplifier performing amplification with a plurality of gains for each signal from a pixel unit and can further reduce a noise component, an imaging device included in an imaging apparatus has the pixel unit in which unit pixels are arranged in a matrix and generates a signal voltage by photoelectric conversion. A column amplifier can amplify a photoelectrically converted signal with a plurality of gains. After an amplified signal is subjected to analog/digital conversion by a column ADC, a signal processing circuit subtracts a noise signal from a pixel signal. A noise signal read out after resetting a floating diffusion section included in the pixel unit and a pixel signal read out immediately thereafter are acquired by being multiplied by a first gain, and a pixel signal read out thereafter is acquired by being multiplied by a second gain. The first gain is set to a value larger than the second gain.
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