NDLI: A CMOS Bio-Inspired 2-D Motion Direction Sensor Based on a Direction Computation Method Derived From the Directionally Selective Ganglion Cells in the Retina

Content Provider	IEEE Xplore Digital Library
Author	Wen-Chia Yang Li-Ju Lin Chiueh, H. Chung-Yu Wu
Copyright Year	2001
Abstract	A CMOS bio-inspired motion direction sensor structure and its associated computation method are proposed. Both method and structure with excitation-inhibition operation are derived from the directionally selective ganglion cells (DSGCs) in the retina to mimic their functions. Edge-number normalization for direction calculation and pseudo-random tessellation (PRT) structure for pixel layout arrangement are also proposed to enhance the accuracy of the computation. An experimental chip based on the proposed method and structure has been designed, fabricated, and measured. The chip comprised 32 × 32 pixels with a pixel size of 63 × 63 μm² and a fill factor of 12.8%. The total chip size is 3.3 × 4.2 mm² and the power consumption is 9.9 mW in the dark and 21 mW at a maximum clock rate of 10 MHz with 3.3-V power supply. The fabricated chip has been measured with different moving patterns, and a computation error of less than 11 degrees has been accomplished. This verifies the correct functions of the proposed motion direction sensor. With the capability of real-time motion detection and processing under low power dissipation, the proposed sensor is feasible for many applications.
Sponsorship	IEEE Sensors Council
Starting Page	3341
Ending Page	3351
Page Count	11
File Size	1844842
File Format	PDF
ISSN	1530437X
Volume Number	11
Issue Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Light emitting diodes Computational modeling Multiplexing Retina Lenses CMOS integrated circuits Motion detection vision chip Directionally selective ganglion cell direction sensor retinal chip
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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