Feedthrough-compensated image sensor

Feedthrough-compensated image sensor

A control pulse is generated a first control signal line coupled to a transfer gate of a pixel to enable photocharge accumulated within a photosensitive element of the pixel to be transferred to a floating diffusion node, the first control signal line having a capacitive coupling to the floating dif...

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Hauptverfasser: Ladd, John, Guidash, Michael, Smith, Craig M, Vogelsang, Thomas, Endsley, Jay
Format: Patent
Sprache:eng
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BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEMICONDUCTOR DEVICES
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creator Ladd, John
Guidash, Michael
Smith, Craig M
Vogelsang, Thomas
Endsley, Jay
description A control pulse is generated a first control signal line coupled to a transfer gate of a pixel to enable photocharge accumulated within a photosensitive element of the pixel to be transferred to a floating diffusion node, the first control signal line having a capacitive coupling to the floating diffusion node. A feedthrough compensation pulse is generated on a second signal line of the pixel array that also has a capacitive coupling to the floating diffusion node. The feedthrough compensation pulse is generated with a pulse polarity opposite the pulse polarity of the control pulse and is timed to coincide with the control pulse such that capacitive feedthrough of the control pulse to the floating diffusion node is reduced.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEMICONDUCTOR DEVICES
title Feedthrough-compensated image sensor
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