CMOSエリアLOGセンサの画素ばらつきキャンセル方法

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書誌事項

タイトル別名
  • Methods for canceling the non-uniformities of the output signals from each pixel of a CMOS Area Logarithmic-Converting Image Sensor
  • CMOS エリア LOG センサ ノ ガソバラツキ キャンセル ホウホウ

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説明

New three methods to cancel the non-uniformities of the output signals from each pixel of a CMOS Area Logarithmic-converting Image Sensor fabricated by using standard CMOS process have been developed. They utilize three types of reset-operation for the purpose. In the first type, a reference corrent source is used. In the second type, a constant-voltage is used. In the third type, a clock applied to the source of the MOSFET that converts the photocurrent to the voltage logarithmically proportional to the amount of incident light is used. In result the voltage offsets caused by the non-uniformities of the output signals from each pixel have reduced from about 20mV(rms)to 8.1mV, 1.49mV and 2.8mV(rms)by each method, respectively.

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