公开(公告)号：US12167158B2

公开(公告)日：2024-12-10

申请号：US18062853

申请日：2022-12-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Daehwa Paik ,  Cyuyeol Rhee ,  Kyungil Kim ,  Jaehong Kim ,  Jinwoo Kim ,  Seunghyun Lim ,  Sanghyun Cho

IPC: H04N25/78 ,  H04N25/709

Abstract: An analog-to-digital converting circuit includes a first amplifier configured to output a first output signal by comparing a pixel signal output from a pixel array with a ramp signal, and a second amplifier configured to generate a second output signal based on the first output signal. The second amplifier includes a first transistor configured to provide a power supply voltage to a first output node in response to the first output signal, a second transistor connected with a capacitor through a bias node, wherein the second transistor is configured to turn on in response to an auto-zero signal, a current source connected with the first transistor through the first output node, the current source configured to generate a power current based on a voltage level of the bias node, and a third transistor connected with the current source.

公开(公告)号：US11627276B2

公开(公告)日：2023-04-11

申请号：US17470187

申请日：2021-09-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Daehwa Paik ,  Jaehong Kim ,  Jinwoo Kim ,  Seunghyun Lim ,  Sanghyun Cho

IPC: H04N5/378 ,  H04N5/369 ,  H04N5/363 ,  H04N5/376 ,  H03M1/56

Abstract: An A/D converter and an image sensor are disclosed. The image sensor includes: a pixel array including a plurality of pixels; a ramp signal generator configured to generate a ramp signal; and a comparison circuit configured to output a comparison result signal by comparing a pixel signal output by the pixel array with the ramp signal. The comparison circuit includes: a first comparator stage configured to output a first stage output signal according to a result of comparing the pixel signal with the ramp signal, to a first circuit node; a limiter including an n-type transistor having one end connected to the first circuit node and an opposite end to which power supply voltage is applied; and a second comparator stage configured to generate the comparison result signal by shaping the first stage output signal.

公开(公告)号：US20230345152A1

公开(公告)日：2023-10-26

申请号：US18062853

申请日：2022-12-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Daehwa Paik ,  Cyuyeol Rhee ,  Kyungil Kim ,  Jaehong Kim ,  Jinwoo Kim ,  Seunghyun Lim ,  Sanghyun Cho

IPC: H04N25/78 ,  H04N25/709

CPC classification number: H04N25/78 ,  H04N25/709

Abstract: An analog-to-digital converting circuit includes a first amplifier configured to output a first output signal by comparing a pixel signal output from a pixel array with a ramp signal, and a second amplifier configured to generate a second output signal based on the first output signal. The second amplifier includes a first transistor configured to provide a power supply voltage to a first output node in response to the first output signal, a second transistor connected with a capacitor through a bias node, wherein the second transistor is configured to turn on in response to an auto-zero signal, a current source connected with the first transistor through the first output node, the current source configured to generate a power current based on a voltage level of the bias node, and a third transistor connected with the current source.

公开(公告)号：US11343449B2

公开(公告)日：2022-05-24

申请号：US17157086

申请日：2021-01-25

Applicant: Samsung Electronics Co., Ltd.

Inventor： Daehwa Paik ,  Seung Hyun Lim ,  Jaehong Kim ,  Keunyung Byun ,  Jinwoo Kim ,  Sanghyun Cho

IPC: H04N5/355 ,  H04N5/3745 ,  H04N5/378

Abstract: Disclosed is an image sensor that includes a pixel array including first pixels sharing a first floating diffusion region and second pixels sharing a second floating diffusion region, a first analog-to-digital converter, a second analog-to-digital converter, and a switch circuit. In a first mode, the first analog-to-digital converter processes the first pixels, and the second analog-to-digital converter processes the second pixels. In the second mode, the first analog-to-digital converter processes a first image component of a pixel signal of the first pixels, and the second analog-to-digital converter processes a second image component of the pixel signal of the first pixels. An HDR image is implemented based on processing results of the first analog-to-digital converter and the second analog-to-digital converter.

公开(公告)号：US20220116564A1

公开(公告)日：2022-04-14

申请号：US17470187

申请日：2021-09-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： DAEHWA PAIK ,  Jaehong Kim ,  Jinwoo Kim ,  Seunghyun Lim ,  Sanghyun Cho

IPC: H04N5/3745 ,  H04N5/369 ,  H04N5/376 ,  H04N5/363 ,  H03M1/56

Abstract: An A/D converter and an image sensor are disclosed. The image sensor includes: a pixel array including a plurality of pixels; a ramp signal generator configured to generate a ramp signal; and a comparison circuit configured to output a comparison result signal by comparing a pixel signal output by the pixel array with the ramp signal. The comparison circuit includes: a first comparator stage configured to output a first stage output signal according to a result of comparing the pixel signal with the ramp signal, to a first circuit node; a limiter including an n-type transistor having one end connected to the first circuit node and an opposite end to which power supply voltage is applied; and a second comparator stage configured to generate the comparison result signal by shaping the first stage output signal.