公开(公告)号：US10044948B2

公开(公告)日：2018-08-07

申请号：US14939868

申请日：2015-11-12

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Liping Deng ,  Zhiqiang Song ,  Pengting Zhang ,  Yi Liu

IPC: H04N5/225 ,  H04N5/353 ,  H04N5/378 ,  H04N5/357 ,  H04N5/3745

Abstract: A pixel cell includes a photodiode to accumulate image charge. A global shutter transistor is coupled to the photodiode to reset the image charge in the photodiode in response to a global shutter control signal. A global shutter control signal generator circuit generates the global shutter control signal to have a first value signal or a second value signal. The first value signal is coupled to turn on the global shutter transistor to reset the photodiode. The second value signal controls the global shutter transistor to be in a low leakage off mode. A supply circuit is coupled to provide the second value signal to the global shutter control signal generator circuit. The supply circuit includes a variable filter circuit coupled to an output of the supply circuit to selectively vary a bandwidth of the second value signal in response to a bandwidth select signal.

公开(公告)号：US09838623B2

公开(公告)日：2017-12-05

申请号：US14939862

申请日：2015-11-12

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Liping Deng ,  Zhiqiang Song ,  Pengting Zhang ,  Yi Liu

IPC: H04N5/353 ,  H04N5/378

CPC classification number: H04N5/3532 ,  H04N5/353 ,  H04N5/37452 ,  H04N5/378

Abstract: A pixel cell includes a photodiode disposed in a semiconductor material to accumulate image charge in response to light. A global shutter transistor is disposed in the semiconductor material and is selectively resets the image charge in the photodiode in response to a global shutter control signal. A global shutter control signal generator circuit is coupled to generate the global shutter control signal to have a first value, a second value, and a third value. The first value of the global shutter control signal is coupled to turn on the global shutter transistor to reset the photodiode. The third value of the global shutter control signal is coupled to control the global shutter transistor to be in a low leakage off mode. The second value of the global shutter control signal is between the first and third values and is turns off the global shutter transistor.

公开(公告)号：US20160309106A1

公开(公告)日：2016-10-20

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。

公开(公告)号：US20170142356A1

公开(公告)日：2017-05-18

申请号：US14939868

申请日：2015-11-12

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Liping Deng ,  Zhiqiang Song ,  Pengting Zhang ,  Yi Liu

IPC: H04N5/353 ,  H04N5/378

CPC classification number: H04N5/3532 ,  H04N5/353 ,  H04N5/3577 ,  H04N5/37452 ,  H04N5/378

Abstract: A pixel cell includes a photodiode to accumulate image charge. A global shutter transistor is coupled to the photodiode to reset the image charge in the photodiode in response to a global shutter control signal. A global shutter control signal generator circuit generates the global shutter control signal to have a first value signal or a second value signal. The first value signal is coupled to turn on the global shutter transistor to reset the photodiode. The second value signal controls the global shutter transistor to be in a low leakage off mode. A supply circuit is coupled to provide the second value signal to the global shutter control signal generator circuit. The supply circuit includes a variable filter circuit coupled to an output of the supply circuit to selectively vary a bandwidth of the second value signal in response to a bandwidth select 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。

公开(公告)号：US20170142355A1

公开(公告)日：2017-05-18

申请号：US14939862

申请日：2015-11-12

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Liping Deng ,  Zhiqiang Song ,  Pengting Zhang ,  Yi Liu

IPC: H04N5/353 ,  H04N5/378

CPC classification number: H04N5/3532 ,  H04N5/353 ,  H04N5/37452 ,  H04N5/378

Abstract: A pixel cell includes a photodiode disposed in a semiconductor material to accumulate image charge in response to light. A global shutter transistor is disposed in the semiconductor material and is selectively resets the image charge in the photodiode in response to a global shutter control signal. A global shutter control signal generator circuit is coupled to generate the global shutter control signal to have a first value, a second value, and a third value. The first value of the global shutter control signal is coupled to turn on the global shutter transistor to reset the photodiode. The third value of the global shutter control signal is coupled to control the global shutter transistor to be in a low leakage off mode. The second value of the global shutter control signal is between the first and third values and is turns off the global shutter transistor.