IMAGE SENSOR INCLUDING SPREAD SPECTRUM CHARGE PUMP
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United States of America Patent
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Issued Date -
Apr 23, 2015
app pub date -
Oct 18, 2013
filing date -
Oct 18, 2013
priority date (Note) -
Abandoned
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Abstract
A method of reducing harmonic tones of noise in an image sensor includes generating a system clock and generating a random clock in response to the system clock. A charge pump is clocked with the random clock to generate a boosted voltage. The boosted voltage is provided to a pixel array of the image sensor. Image charge is readout from pixel cells of the pixel array using the boosted voltage from the charge pump.
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