Abstract:
PURPOSE: A clock driver and a charge pump with the same are provided to supply a stable step-up voltage to an image sensor by minimizing the ripple. CONSTITUTION: A clock driver(120) generates at least one control clock for controlling a pumping circuit(110). The clock driver includes a first driver(121) and a second driver(122). The first driver generates a first control clock by puling up a first node in response to a first reference clock and pulling down the first node in response to a second reference clock. A second driver generates a second control clock by pulling up the second node in response to the second reference clock and pulling down the second node in response to the first reference clock. The first driver includes a first hysteresis controller(121_1) generating a first output signal with the time delay in response to the rising transition and the falling transition of the second reference clock.
Abstract:
이미지 센서 및 그 구동 방법이 제공된다. 상기 이미지 센서는 동일한 수평라인에 배치되는 n(단, n은 2이상의 자연수)개의 옵티컬 블랙 픽셀; 및 상기 n개의 옵티컬 블랙 픽셀에 매칭되는, m(단, m은 n보다 큰 자연수)개의 비교기를 포함할 수 있다.
Abstract:
이미지 센서는 복수의 픽셀들을 포함하는 픽셀 어레이와, 상기 복수의 픽셀들 각각의 동작을 제어하는 로우 드라이버와, 상기 복수의 픽셀들 각각에 포함된 리셋 트랜지스터에 접속된 전압 공급 라인과, 상기 전압 공급 라인의 신호를 검출하고 검출 결과에 기초하여 제1전압과 제2전압 중에서 어느 하나를 상기 전압 공급 라인으로 공급하는 전압 공급 회로를 포함한다.
Abstract:
Disclosed is an image sensor. The image sensor according to an embodiment of the invention comprises: at least one active pixel and at least one line-optical black (L-OB) pixel arranged in a matrix formation including first through n^th rows and first through m^th columns; a pixel array which outputs pixel signals and dark level offset signals for columns during a readout process on at least one of the first through n^th rows; a row driver which outputs a selection control signal for the first through n^th rows; and an analog to digital converter (ADC) block which converts the pixel signal and the dark level offset signal to a digital format, wherein the pixel array simultaneously outputs dark level offset signals for L-OB pixels included in another row during the readout process on at least one of the first through n^th rows, and n and m are integers greater than or equal to two. By using the image sensor according to an embodiment of the invention, the number of L-OB pixels contributing to the readout process on one of the rows is boosted without increase of the size of a pixel array, such that pixel specific noises are efficiently reduced.