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Patent Agency Ranking
公开(公告)号：US20240397236A1
公开(公告)日：2024-11-28
申请号：US18322408
申请日：2023-05-23
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Hiroaki Ebihara , Jiayu Guo , Liang Zuo , Lihang Fan
IPC: H04N25/78 , H04N25/616
Abstract: A readout circuit includes a comparator having a first input coupled to receive a ramp signal from a ramp generator and a second input coupled to receive an analog image data signal from one of a plurality of bitlines. The comparator is configured to generate a comparator output in response to a comparison of the ramp signal and the analog image data signal. A sampling circuit has a first input coupled to receive a sampling control signal and a second input coupled to receive the comparator output. The sampling circuit is configured to generate a sampling output. A counter has a first input coupled to receive a counter control signal and a second input coupled to receive one of the comparator output and a signal from the sampling circuit. The readout circuit is configured to perform correlated multiple sampling (CMS) calculations or non-CMS calculations in response to the sampling output.
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公开(公告)号：US12200389B2
公开(公告)日：2025-01-14
申请号：US18322408
申请日：2023-05-23
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Hiroaki Ebihara , Jiayu Guo , Liang Zuo , Lihang Fan
Abstract: A readout circuit includes a comparator having a first input coupled to receive a ramp signal from a ramp generator and a second input coupled to receive an analog image data signal from one of a plurality of bitlines. The comparator is configured to generate a comparator output in response to a comparison of the ramp signal and the analog image data signal. A sampling circuit has a first input coupled to receive a sampling control signal and a second input coupled to receive the comparator output. The sampling circuit is configured to generate a sampling output. A counter has a first input coupled to receive a counter control signal and a second input coupled to receive one of the comparator output and a signal from the sampling circuit. The readout circuit is configured to perform correlated multiple sampling (CMS) calculations or non-CMS calculations in response to the sampling output.
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公开(公告)号：US20240397226A1
公开(公告)日：2024-11-28
申请号：US18322431
申请日：2023-05-23
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Jiayu Guo , Hiroaki Ebihara , Liang Zuo , Lihang Fan , Satoshi Sakurai
Abstract: An arithmetic logic unit (ALU) includes a front end latch stage coupled to a Gray code (GC) generator to latch GC outputs, a signal latch stage coupled to latch outputs of the front end latch stage, a GC to binary stage coupled to generate a binary representation of the GC outputs, an adder stage including first inputs coupled to receive outputs of the GC to binary stage, a pre-latch stage coupled to latch outputs of the adder stage, and a feedback latch stage coupled to latch outputs of the pre-latch stage in response to a feedback latch enable signal. The feedback latch enable signal is one of a correlated multiple sampling (CMS) feedback enable signal and a non-CMS feedback enable signal. The ALU is configured to perform CMS calculations in response to the CMS feedback enable signal and perform non-CMS calculations in response to the non-CMS feedback enable signal.
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公开(公告)号：US10834351B2
公开(公告)日：2020-11-10
申请号：US16199887
申请日：2018-11-26
Applicant: OmniVision Technologies, Inc.
Inventor： Rui Wang , Tiejun Dai , Ling Fu , Jiayu Guo
Abstract: An image sensor includes pixel circuitry with a photodiode to receive light and output a pixel signal. The image sensor also includes readout circuitry with a first sample and hold transistor coupled to the pixel circuitry, and a first capacitor coupled to the first sample and hold transistor to receive the pixel signal. A second sample and hold transistor is coupled to the pixel circuitry, and a second capacitor is coupled to the second sample and hold transistor to receive the pixel signal. A first output switch is coupled to output the pixel signal from the first capacitor, and a second output switch is coupled to output the pixel signal from the second capacitor. A boost transistor is coupled to connect the first output switch and the second output switch when the boost transistor is turned on.
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公开(公告)号：US20200169682A1
公开(公告)日：2020-05-28
申请号：US16199887
申请日：2018-11-26
Applicant: OmniVision Technologies, Inc.
Inventor： Rui Wang , Tiejun Dai , Ling Fu , Jiayu Guo
Abstract: An image sensor includes pixel circuitry with a photodiode to receive light and output a pixel signal. The image sensor also includes readout circuitry with a first sample and hold transistor coupled to the pixel circuitry, and a first capacitor coupled to the first sample and hold transistor to receive the pixel signal. A second sample and hold transistor is coupled to the pixel circuitry, and a second capacitor is coupled to the second sample and hold transistor to receive the pixel signal. A first output switch is coupled to output the pixel signal from the first capacitor, and a second output switch is coupled to output the pixel signal from the second capacitor. A boost transistor is coupled to connect the first output switch and the second output switch when the boost transistor is turned on.
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