A Dual-Operation-Mode Bio-Inspired Pixel

Author

Lenero-Bardallo, Juan A. ; Hafliger, Philipp

Author_Institution

Inst. of Microelectron. of Seville, Univ. de Sevilla, Sevilla, Spain

Volume

61

Issue

11

fYear

2014

fDate

Nov. 2014

Firstpage

855

Lastpage

859

Abstract

A new bio-inspired pixel concept is proposed. It can compute the spatial contrast and provide intensity images. The pixel sends spikes to communicate with its neighbors, computing the spatial contrast. Its expected fixed-pattern noise within neuromorphic arrays is 1% without using calibration. Its fill factor is 8.5%. Furthermore, the pixel has two different readout modes: pulse density modulation and time to first spike. The user can toggle any time between operation and readout modes, depending on the desired image quality and the bandwidth and power consumption requirements. The pixel has been implemented in AMS4M2P 0.35-μm CMOS technology. Experimental results are provided.

Keywords

CMOS image sensors; pulse modulation; sensor arrays; AMS4M2P; CMOS technology; bandwidth requirements; dual operation mode bio inspired pixel; fill factor; fixed pattern noise; image quality; neuromorphic array; power consumption requirements; pulse density modulation; readout mode; size 0.35 mum; spatial contrast computation; Biosensors; Neurons; Photoconductivity; Power demand; Transistors; Wireless sensor networks; Address event representation (AER); asynchronous vision sensors; bio-inspired vision; spatial contrast;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2014.2350352

Filename

6882214