An APS-H-Size 250Mpixel CMOS Image Sensor Using Column Single-Slope ADCs with Dual-Gain Amplifiers

📋 论文概要

该论文提出了一款APS-H尺寸的250M像素CMOS图像传感器，通过采用列单斜率ADC与双增益放大器解决了高分辨率图像传感器中信号读出的速度瓶颈问题。

💡 主要创新点

• 实现了APS-H尺寸的250M像素超高分辨率CMOS图像传感器，适用于安全、科学等专业领域。
• 创新性地采用列单斜率ADC结合双增益放大器架构，显著提升了信号读出的速度。

🏷 关键词

📄 原文摘要

Daisuke Yoshida, Yasushi Matsuno, Masanobu Ohmura, Hidekazu Takahashi, Katsuhito Sakurai, Takeshi Ichikawa, Hiroshi Yuzurihara, Shunsuke Inoue Canon, Kawasaki, Japan Recently, there has been strong demand for high-resolution CMOS image sensors (large number of pixels) in the fields of security, science, and other specialized areas [1,2]. One of the major issues in realizing high-resolution image sensors is to speed up signal readout. For high-speed signal readout, it is necessary to accelerate pixel readout, AD conversion in column circuits, horizontal data output from column memories, and digital data output from the chip. Single-slope ADCs (SS-ADC) are the most common architecture in commercialized CMOS image sensors; increasing their counting clock frequency up to 2.376GHz [3] and using multiple ramp signals [4] can shorten the AD conversion period. However, the former has difficulty in maintaining the clock quality and suppressing power

👥 作者与机构

Hirofumi Totsuka, Toshiki Tsuboi, Takashi Muto,