公开(公告)号：US11206392B1

公开(公告)日：2021-12-21

申请号：US16931194

申请日：2020-07-16

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Liang Zuo ,  Min Qu ,  Xuelian Liu ,  Rui Wang ,  Zhe Gao ,  Zhiyong Zhan

IPC: H04N17/00 ,  H04N5/3745 ,  H04N5/378

Abstract: An image sensor includes a pixel array with active rows of pixel cells, a black level calibration row with black image data generation circuits coupled to generate black image data signals representative of an absence of the incident light, and a dummy row with black level clamping circuits coupled to receive a black sun reference voltage to clamp bitlines of the pixel array, and a black level calibration circuit coupled to receive the black sun reference voltage to generate a black sun calibration voltage. A black sun feedback circuit is coupled to generate the black sun reference voltage in response to the black sun calibration voltage and a black level sample reference, and a black level sampling circuit is coupled to the bitlines to sample the black image data signals to generate the black level sample reference received by the black sun feedback circuit.

公开(公告)号：US11095836B2

公开(公告)日：2021-08-17

申请号：US16685663

申请日：2019-11-15

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Rui Wang ,  Hiroaki Ebihara ,  Zhiyong Zhan ,  Liang Zuo ,  Min Qu ,  Wanqing Xin ,  Xuelian Liu

IPC: H04N5/341 ,  H04N5/378 ,  H04N5/351 ,  H04N5/357

Abstract: An image sensor includes a pixel array with rows and columns of pixels. Each row of the pixel array has a first end that is opposite a second end of each row of the pixel array. Control circuitry is coupled to the first end of each row of the pixel array to provide control signals to each row of the pixel array from the first end of each row of the pixel array. Far end driver circuitry coupled to the second end of each row of the pixel array to selectively further drive from the second end of each row of the pixel array the control signals provided by the control circuitry from the first end of each row of the pixel array. The control circuitry is further coupled to provide far end control signals to the far end driver circuitry.

公开(公告)号：US09817048B2

公开(公告)日：2017-11-14

申请号：US14964159

申请日：2015-12-09

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Yingkan Lin ,  Liang Zuo ,  Liping Deng

IPC: G01R29/26

CPC classification number: G01R29/26 ,  G01R31/40

Abstract: A power supply noise measurement circuit includes a multiphase filter coupled to receive a power supply signal. The multiphase filter is coupled to output a first filtered power supply signal for a first phase, and a second filtered power supply signal for a second phase. A multiphase amplifier is coupled to the multiphase filter to sample offset voltages in response to the first filter power supply signal during the first phase to set up DC operation points in the multiphase amplifier, and generate an amplified power supply noise signal during the second phase. An overshoot detector is coupled to the multiphase amplifier to detect overshoot events in the amplified power supply noise signal, and an undershoot detector is coupled to the multiphase amplifier to detect undershoot events in the amplified power supply noise signal.

公开(公告)号：US09554074B2

公开(公告)日：2017-01-24

申请号：US14688260

申请日：2015-04-16

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Liang Zuo ,  Zhiqiang Song ,  Liping Deng

IPC: H04N5/378 ,  H04N5/357

CPC classification number: H04N5/378 ,  H04N5/357 ,  H04N5/3745

Abstract: A readout circuit for use in an image sensor includes a sense amplifier circuit coupled to a bitline to sense analog image data from a pixel cell of the image sensor. An analog to digital converter is coupled to the sense amplifier circuit to convert the analog image data to digital image data. A ramp generator circuit is coupled to generate a first ramp signal. The analog to digital converter is coupled to generate the digital image data in response to the analog image data and the first ramp signal. A first capacitive voltage divider is coupled to the ramp generator. The first capacitive voltage divider is coupled to reduce an output voltage swing of the first ramp signal coupled to be received by the analog to digital converter to reduce noise in the first ramp signal.

Abstract translation: 用于图像传感器的读出电路包括耦合到位线的读出放大器电路，以检测来自图像传感器的像素单元的模拟图像数据。 模数转换器耦合到读出放大器电路，以将模拟图像数据转换为数字图像数据。 斜坡发生器电路被耦合以产生第一斜坡信号。 模拟数字转换器被耦合以响应于模拟图像数据和第一斜坡信号而生成数字图像数据。 第一电容分压器耦合到斜坡发生器。 第一电容性分压器被耦合以减少耦合以由模数转换器接收的第一斜坡信号的输出电压摆幅，以减少第一斜坡信号中的噪声。