Title :
A high dynamic range low power oscillating pixel for a bio-inspired sensor
Author :
Nicola, Massari ; Marco, De Nicola ; Gianmaria, Pedretti ; Massimo, Gottardi
Author_Institution :
Integrated Opt. Sensor (SOI) Group, FBK (Fondazione Bruno Kessler), Povo, Italy
Abstract :
An ultra-low power biologically inspired pixel is presented in this paper. The pixel has been simulated and designed in 0.35μm CMOS technology and then successfully tested. The core oscillating pixel is a circuit that basically consists of only 5 transistors, potentially showing a reasonable pixel pitch. Thanks to the implemented light to frequency conversion, this pixel topology allows to realize a pulsed-based architecture for a bio-inspired camera. The digital output of the proposed circuit is demonstrated to be linearly proportional to the light impinging on the photodiode potentially performing a dynamic range of more than 120dB and showing a simulated power consumption of 470 pJ/MHz per pixel.
Keywords :
CMOS image sensors; low-power electronics; photodiodes; CMOS technology; bioinspired camera; frequency conversion; high dynamic range low power oscillating pixel; photodiode; pixel topology; pulsed-based architecture; size 0.35 mum; ultra-low power biologically inspired pixel; Dynamic range; Frequency measurement; Photoconductivity; Photodiodes; Pixel; Transistors;
Conference_Titel :
Biomedical Circuits and Systems Conference (BioCAS), 2010 IEEE
Conference_Location :
Paphos
Print_ISBN :
978-1-4244-7269-7
Electronic_ISBN :
978-1-4244-7268-0
DOI :
10.1109/BIOCAS.2010.5709620
