A Bio-Inspired AER Temporal Tri-Color Differentiator Pixel Array

IF 3.8 2区医学 Q2 ENGINEERING, BIOMEDICAL IEEE Transactions on Biomedical Circuits and Systems Pub Date : 2015-10-30 DOI:10.1109/TBCAS.2015.2492460

Lukasz Farian, J. A. Leñero-Bardallo, P. Häfliger

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引用次数: 10

Abstract

This article investigates the potential of a bio-inspired vision sensor with pixels that detect transients between three primary colors. The in-pixel color processing is inspired by the retinal color opponency that are found in mammalian retinas. Color transitions in a pixel are represented by voltage spikes, which are akin to a neuron's action potential. These spikes are conveyed off-chip by the Address Event Representation (AER) protocol. To achieve sensitivity to three different color spectra within the visual spectrum, each pixel has three stacked photodiodes at different depths in the silicon substrate. The sensor has been fabricated in the standard TSMC 90 nm CMOS technology. A post-processing method to decode events into color transitions has been proposed and implemented as a custom interface to display real-time color changes in the visual scene. Experimental results are provided. Color transitions can be detected at high speed (up to 2.7 kHz). The sensor has a dynamic range of 58 dB and a power consumption of 22.5 mW. This type of sensor can be of use in industrial, robotics, automotive and other applications where essential information is contained in transient emissions shifts within the visual spectrum.

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一种生物启发的AER时间三色微分器像素阵列

本文研究了一种具有像素的仿生视觉传感器的潜力，该传感器可以检测三原色之间的瞬变。像素内颜色处理的灵感来自于在哺乳动物视网膜中发现的视网膜颜色对抗。像素中的颜色转换由电压尖峰表示，它类似于神经元的动作电位。这些峰值通过地址事件表示(AER)协议传输到片外。为了在可见光谱内实现对三种不同颜色光谱的灵敏度，每个像素在硅衬底的不同深度有三个堆叠的光电二极管。该传感器采用台积电90纳米CMOS标准工艺制造。提出了一种将事件解码为颜色转换的后处理方法，并将其作为自定义接口实现，以显示视觉场景中的实时颜色变化。给出了实验结果。颜色转换可以在高速(高达2.7 kHz)检测。该传感器的动态范围为58 dB，功耗为22.5 mW。这种类型的传感器可用于工业、机器人、汽车和其他应用，在这些应用中，基本信息包含在视觉光谱内的瞬态发射位移中。

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来源期刊

IEEE Transactions on Biomedical Circuits and Systems 工程技术-工程：电子与电气

CiteScore

10.00

自引率

13.70%

发文量

174

审稿时长

3 months

期刊介绍： The IEEE Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems Society to a wide variety of related areas such as: • Bioelectronics • Implantable and wearable electronics like cochlear and retinal prosthesis, motor control, etc. • Biotechnology sensor circuits, integrated systems, and networks • Micropower imaging technology • BioMEMS • Lab-on-chip Bio-nanotechnology • Organic Semiconductors • Biomedical Engineering • Genomics and Proteomics • Neuromorphic Engineering • Smart sensors • Low power micro- and nanoelectronics • Mixed-mode system-on-chip • Wireless technology • Gene circuits and molecular circuits • System biology • Brain science and engineering: such as neuro-informatics, neural prosthesis, cognitive engineering, brain computer interface • Healthcare: information technology for biomedical, epidemiology, and other related life science applications. General, theoretical, and application-oriented papers in the abovementioned technical areas with a Circuits and Systems perspective are encouraged to publish in TBioCAS. Of special interest are biomedical-oriented papers with a Circuits and Systems angle.