Pixel design including in-pixel correlated double sampling circuit
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United States of America Patent
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Oct 2, 2007
Grant Date -
N/A
app pub date -
Oct 31, 2002
filing date -
Oct 31, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An image sensor having a plurality of pixels, each including a sense node; an output node; a first device, connected to the sense node, producing a signal at the sense node that is proportional to incident light intensity at the pixel; at least one select node to receive a first select signal for selecting the pixel output node from the plurality of pixels; a reset device for resetting the pixel; and a sample and hold circuit including a sample node coupled to the sense node. At least one amplifier is provided, including a first input node to receive an output signal from the output node of a selected pixel and a second input node connected to a reference voltage source provided as a reference to reset a selected pixel. An amplifier output node is connected to couple an amplifier output signal to a selected pixel's sample and hold circuit.
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