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公开(公告)号：US20180255255A1
公开(公告)日：2018-09-06
申请号：US15446711
申请日：2017-03-01
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Yingkan Lin , Tiejun Dai , Cheng-Pin Lin , Yu-Shen Yang
CPC classification number: H04N5/3577 , H04N5/3765 , H04N5/378 , H04N5/907
Abstract: Methods and apparatuses for data transmission in an image sensor are disclosed herein. An example data transmission circuit may include a plurality of transmission banks coupled in series with a first one of the plurality of transmission banks coupled to function logic, where each of the plurality of transmission banks are coupled to provide image data to a subsequent transmission bank in a direction toward the function logic in response to a clock signal, a plurality of delays coupled in series, wherein each of the plurality of delays is associated with and coupled to a respective transmission bank of the plurality of transmission banks, and wherein the clock signal is received by each of the plurality of transmission banks after being delayed by a respective number of delays of the plurality of delays in relation to the function logic.
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公开(公告)号：US20180167573A1
公开(公告)日：2018-06-14
申请号：US15376352
申请日：2016-12-12
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Fan Zhu , Yu-Shen Yang , Yingkan Lin , Zejian Wang , Liping Deng
Abstract: An example method for fast ramp start-up during analog to digital conversion (ADC) includes opening a feedback bypass switch coupled to an amplifier to initiate an ADC operation, providing an injection current pulse to an inverting input of the amplifier, where the non-inverting input is coupled to a feedback bypass switch, integrating a first reference current coupled to the inverting input of the amplifier, where the integrating of the first reference current occurs due to the opening of the feedback bypass switch, and providing a reference voltage in response to the injection current pulse, the integrating of the first reference current, and a reference voltage coupled to a non-inverting input of the amplifier, where a level of the reference voltage is increased at least at initiation of the ADC operation in response to the injection current pulse.
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Patent Agency Ranking
13.发明授权公开(公告)号：US10432879B2
公开(公告)日：2019-10-01
申请号：US15872741
申请日：2018-01-16
Applicant: OmniVision Technologies, Inc.
Inventor： Chun-Hsiang Chang , Yingkan Lin , Jingwei Lai , Zhe Gao
Abstract: A readout circuit includes a comparator coupled to receive a ramp signal an output of a dual conversion gain pixel. A single counter is coupled to the output of the comparator. The counter is coupled to write to only one of a first or a second memory circuits at a time. A first multiplexor is coupled to load either an initial value or an initial memory value from the first memory circuit into the counter. A second multiplexor is coupled to load either a low conversion gain memory value from the first memory circuit or a high conversion gain memory value from the second memory circuit into a single data transmitter, which is coupled to transmit the received memory value to a digital processor.
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14.发明授权公开(公告)号：US10326955B1
公开(公告)日：2019-06-18
申请号：US15872709
申请日：2018-01-16
Applicant: OmniVision Technologies, Inc.
Inventor： Yingkan Lin , Charles Wu , Yu-Shen Yang
IPC: H04N5/378 , H04N5/369 , H04N5/3745 , H04N5/376
Abstract: A readout circuit for use with an image sensor includes a comparator coupled to compare a ramp signal from a ramp generator with an output signal from a pixel of a pixel array. A counter is coupled to the comparator to count until the comparator detects that a ramp signal value has reached an output signal value. The counter includes K cascade-coupled dynamic flip-flop circuits to generate the K least significant bits (LSBs) of the N-bit output of the counter. The counter also includes N-K cascade-coupled static flip-flop circuits to generate the N-K most significant bits (MSBs) of the N-bit output of the counter. A latch is coupled to the counter to store a count value generated by the counter after the ramp signal value has reached the output signal value.
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公开(公告)号：US10110837B2
公开(公告)日：2018-10-23
申请号：US15446711
申请日：2017-03-01
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Yingkan Lin , Tiejun Dai , Cheng-Pin Lin , Yu-Shen Yang
Abstract: Methods and apparatuses for data transmission in an image sensor are disclosed herein. An example data transmission circuit may include a plurality of transmission banks coupled in series with a first one of the plurality of transmission banks coupled to function logic, where each of the plurality of transmission banks are coupled to provide image data to a subsequent transmission bank in a direction toward the function logic in response to a clock signal, a plurality of delays coupled in series, wherein each of the plurality of delays is associated with and coupled to a respective transmission bank of the plurality of transmission banks, and wherein the clock signal is received by each of the plurality of transmission banks after being delayed by a respective number of delays of the plurality of delays in relation to the function logic.
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公开(公告)号：US20170359532A1
公开(公告)日：2017-12-14
申请号：US15179648
申请日：2016-06-10
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Bi Yuan , Liping Deng , Yingkan Lin , Liang Zuo , Yuxin Wang
Abstract: An image sensor pixel noise measurement circuit includes a pixel array on an integrated circuit chip. The pixel array includes a plurality of pixels including a first pixel to output a first image data signal, and a second pixel to output a second image data signal. A noise amplification circuit on the integrated circuit chip is coupled to receive the first and second image data signals from the pixel array. The noise amplification circuit is coupled to output an amplified differential noise signal in response to the first and second image data signals received from the pixel array. A fast Fourier transform (FFT) analysis circuit on the integrated circuit chip is coupled to transform the amplified differential noise signal output by the noise amplification circuit from a time domain to a frequency domain to analyze a pixel noise characteristic of the pixel array.
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公开(公告)号：US20170289470A1
公开(公告)日：2017-10-05
申请号：US15087253
申请日：2016-03-31
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Liping Deng , Min Qu , Bi Yuan , Yingkan Lin
CPC classification number: H04N5/357 , H04N5/3698 , H04N5/37455 , H04N5/37457 , H04N5/3765 , H04N5/378
Abstract: A readout circuit for use in an image sensor includes a system ramp generator coupled to generate a system ramp signal. A plurality of analog-to-digital converters is coupled to a plurality of column bitlines from a pixel array to receive corresponding analog column image signals. An isolation ramp buffer is coupled between the system ramp generator and the analog-to-digital converters. The isolation ramp buffer includes a single input to receive the system ramp signal, and a plurality of isolated outputs. Each of the isolated outputs is coupled to provide an isolated column ramp signal to a corresponding analog-to-digital converter. Each of the of analog-to-digital converters is coupled to generate a corresponding digital column image signal in response to the corresponding analog column image signal and corresponding isolated column ramp signal.
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