用于生物医学应用的具有两个像素内 SD 的 7 位 SD-FWC 1.2e-RMS 时滞随机噪声 128×256 时间分辨 CMOS 图像传感器。

A 7 ke-SD-FWC 1.2 e-RMS Temporal Random Noise 128×256 Time-Resolved CMOS Image Sensor With Two In-Pixel SDs for Biomedical Applications.

出版信息

IEEE Trans Biomed Circuits Syst. 2017 Dec;11(6):1335-1343. doi: 10.1109/TBCAS.2017.2738322. Epub 2017 Sep 21.

DOI:10.1109/TBCAS.2017.2738322

Abstract

A large full well capacity (FWC) for wide signal detection range and low temporal random noise for high sensitivity lock-in pixel CMOS image sensor (CIS) embedded with two in-pixel storage diodes (SDs) has been developed and presented in this paper. For fast charge transfer from photodiode to SDs, a lateral electric field charge modulator (LEFM) is used for the developed lock-in pixel. As a result, the time-resolved CIS achieves a very large SD-FWC of approximately 7ke-, low temporal random noise of 1.2e-rms at 20 fps with true correlated double sampling operation and fast intrinsic response less than 500 ps at 635 nm. The proposed imager has an effective pixel array of and a pixel size of . The sensor chip is fabricated by Dongbu HiTek 1P4M 0.11 CIS process.

摘要

本文提出并开发了一种具有大满阱容量（FWC）的、用于宽信号检测范围的、低时间随机噪声的、灵敏度高的锁相像素 CMOS 图像传感器（CIS），该 CIS 中嵌入了两个像素内存储二极管（SD）。为了实现光电二极管到 SD 的快速电荷转移，本文为所开发的锁相像素使用了横向电场电荷调制器（LEFM）。因此，时间分辨 CIS 实现了非常大的 SD-FWC，约为 7ke-，在 20 fps 时具有低时间随机噪声 1.2e-rms，具有真正的相关双采样操作和快于 635nm 时的 500ps 的固有响应。所提出的图像传感器具有有效像素阵列和像素尺寸为。传感器芯片由 Dongbu HiTek 1P4M 0.11 CIS 工艺制造。