IMAGER PIXEL WITH CAPACITANCE CIRCUIT FOR BOOSTING RESET VOLTAGE
2 Assignments
0 Petitions
Accused Products
Abstract
A pixel cell in which a capacitance is coupled between a storage node and a row select transistor and another capacitance is coupled between a storage node and a voltage supply or ground source potential to boost a reset voltage.
30 Citations
60 Claims
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1-44. -44. (canceled)
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45. A pixel circuit comprising:
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a photo-conversion device; a floating diffusion region for receiving and storing charge from said photo-conversion device; a reset transistor for resetting said floating diffusion region to a reset voltage state; a readout circuit for reading out a signal based on charges stored at said floating diffusion region; and a voltage boost circuit operating in response to a switching state of a switching device of said pixel circuit for boosting a reset voltage on said floating diffusion region above said reset voltage state, said voltage boost circuit comprising a capacitance circuit. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52)
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53. A method of fabricating an integrated circuit comprising:
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forming a photo-conversion device; forming a floating diffusion region for receiving and storing charge from said photo-conversion device; forming a reset transistor for resetting said floating diffusion region to a reset voltage state; forming a readout circuit for reading out a signal based on charges stored at said floating diffusion region; and forming a voltage boost circuit operating in response to a switching state of a switching device of said pixel circuit for boosting a reset voltage on said floating diffusion region above said reset voltage state, voltage boost circuit comprising a capacitance circuit. - View Dependent Claims (54, 55, 56, 57)
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58. A method of operating a pixel comprising the steps of:
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receiving light in a photo-conversion device, said photo-conversion device converting said light into electrical charge; resetting a floating diffusion region to a reset voltage state; boosting a voltage on said floating diffusion region above said reset voltage state with a capacitance circuit operating in response to a switching state of a switching device; reading out said boosted reset voltage; and reading out a signal based on stored charge at said floating diffusion region from said photo-conversion device. - View Dependent Claims (59, 60)
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Specification