Biasing scheme for large format CMOS active pixel sensors
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United States of America Patent
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Mar 24, 2015
Grant Date -
Jan 1, 2009
app pub date -
Jul 3, 2008
filing date -
Apr 9, 2003
priority date (Note) -
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Abstract
An image sensor includes circuitry compensating for voltage drops in a VSS line. The image sensor includes a plurality of photoreceptors arranged in a pixel array having a number of column lines, and read-out circuitry on the column lines. The read-out circuitry provides substantially equal currents on each column line so as to compensate for voltage drops in the VSS line and provide more accurate pixel signals. The image sensor also includes circuitry for filtering noise from a voltage supply line, and for providing hard and/or soft reset operations.
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