IMAGE SENSOR PIXEL WITH MULTILEVEL TRANSFER GATE
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United States of America Patent
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Issued Date -
Jul 16, 2015
app pub date -
Jan 16, 2014
filing date -
Jan 16, 2014
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Abstract
An image sensor and a method for operating an image sensor are provided. In one aspect, the image sensor includes a pixel with multilevel transfer gate. The image sensor includes a pixel coupled to an output line. The pixel includes a photodiode configured to generate electrical charges in response to light. The pixel also includes a capacitive element for storing electrical charges for providing a value to the output line. A transfer gate is coupled between the photodiode and the capacitive element. The transfer gate is configured to activate to transfer the electrical charges between the photodiode and the capacitive element. The image sensor is configured to provide at least one control signal operating in a plurality of voltages to the transfer gate. The plurality of voltages is in addition to a voltage which deactivates the transfer gate.
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