Back to results
US 10,484,630 B2Granted
Image sensor including feedback device to reduce noise during reset operation
AssigneeSamsung Electronics Co., Ltd.
InventorsMin-Sun Keel, Kyoungmin Koh, Sanghoon Ha
Life of this patent
Estimating the term…
Abstract
An image sensor includes a photoelectric device generating an electric charge from light; a feedback device generating a reset voltage using a predetermined reference voltage; and a pixel circuit generating a pixel voltage using the reset voltage and the electric charge, setting the reset voltage to the reference voltage using the feedback device a first period, and outputting the pixel voltage and the reset voltage during a second period.
Claims21
An image sensor, comprising:
- a photoelectric device configured to generate an electric charge from light;
- a feedback device configured to generate a reset voltage using a predetermined reference voltage;
- and
- a pixel circuit configured to generate a pixel voltage using the reset voltage and the electric charge, set the reset voltage to the reference voltage using the feedback device during a first period, and output the pixel voltage and the reset voltage during a second period,
- wherein the pixel circuit comprises a reset transistor and a driving transistor,
- wherein the feedback device comprises an operational amplifier including a first input terminal connected to an output of the driving transistor, a second input terminal receiving the reference voltage, and an output terminal providing the reset voltage to the reset transistor.
3 more elements
An image sensor, comprising:
- a photoelectric device configured to generate an electric charge from light;
- a feedback device configured to generate a reset voltage using a predetermined reference voltage;
- and
- a pixel circuit configured to generate a pixel voltage using the reset voltage and the electric charge, set the reset voltage to the reference voltage using the feedback device during a first period, and output the pixel voltage and the reset voltage during a second period,
- wherein the first period and the second period have a same duration, and the second period occurs after the first period.
2 more elements
An image sensor, comprising:
- a pixel array, including a plurality of pixels arranged along a plurality of row fines and a plurality of column lines, each of the plurality of pixels having a photoelectric device receiving light and generating an electric charge, a feedback device generating a reset voltage, and a pixel circuit generating a pixel voltage using the electric charge;
- a row driver configured to set the reset voltage to a predetermined reference voltage by activating the feedback device included in each of the plurality of pixels connected to a first row the among the plurality of row lines during a single horizontal period and control each of the plurality of pixels connected to a second row line different from the first row line to output the pixel voltage and the reset voltage during the single horizontal period;
- and
- a sampling circuit configured to detect the pixel voltage and the reset voltage from each of the plurality of pixels connected to the second row line during the single horizontal period,
- wherein the feedback device comprises an operation amplifier comprising a first input terminal receiving the pixel voltage, a second input terminal receiving the reference voltage, and an output terminal providing the reset voltage.
2 more elements
Dependencies are inferred from the claim text.