A 0.50e-rms Noise 1.45µm-Pitch CMOS Image Sensor with Reference-Shared In-Pixel Differential Amplifier at 8.3Mpixel 35fps

📋 论文概要

本文提出了一种参考共享的像素内差分放大器结构，用于实现1.45µm像素间距的CMOS图像传感器，在8.3Mpixel分辨率下以35fps帧率工作，读出噪声仅为0.50e-rms。解决了传统高增益前端需要额外像素内晶体管导致像素尺寸难以缩小的问题。

💡 主要创新点

• 采用参考共享（Reference-Shared）的像素内差分放大器，在无需额外PMOS或NMOS的情况下实现低噪声读出，支持更小的像素尺寸。
• 实现了1.45µm像素间距下0.50e-rms的超低读出噪声，同时保持8.3Mpixel的高分辨率和35fps的高帧率。

🏷 关键词

📄 原文摘要

dark and bright conditions. In recent years, these features have been required for small pixel CMOS image sensors (CISs) to realize high S/N and resolutions while maintaining a high frame rate. An effective way to improve readout noise is to apply high gain at the front stage of the read chain to suppress noise originating at the back stage; sub-electron read noise CISs have been developed [1-3]. These approaches, however, are not suited for pixel size shrinkage, as they require the following transistors within the pixel area: a PMOS or an additional NMOS; the NMOS configures a low conversion gain mode to readout the entire signal of fullwell capacity. A quanta image sensor that can achieve photon count level noise

👥 作者与机构

Mamoru Sato, Yuhi Yorikado, Yusuke Matsumura, Hideki Naganuma,

Eriko Kato, Takuya Toyofuku, Akihiko Kato, Yusuke Oike Sony Semiconductor Solutions, Atsugi, Japan Low noise and high dynamic range are essential features for imaging under both