Solid-state imaging device including A/D converting circuit with power-down controller
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United States of America Patent
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Oct 11, 2011
Grant Date -
Jul 2, 2009
app pub date -
Sep 17, 2008
filing date -
Dec 26, 2007
priority date (Note) -
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Abstract
A solid-state imaging device includes pixels, arranged in a matrix, each of which converts light into a signal voltage. The solid-state imaging device also includes column signal lines, each of which is provided for corresponding one of columns, so that the signal voltage is provided to corresponding one of the column signal lines. Additionally, the solid-state imaging device includes AD converting units, each of which is provided for the corresponding one of the column signal lines, and is configured to convert the signal voltage into a digital signal. Each of the AD converting units includes a comparing unit generating an output signal indicating a greater voltage of the signal voltage and a reference voltage, and a counting unit counting a count value until logic of the output signal is inverted The solid-state imaging device further includes a suspending unit suspending power supply to the comparing units after the logic of the output signals is inverted.
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