Adaptive Gain and Analog Wavelet Transform for Low-Power Infrared Image Sensors. (9th April 2012)

• Record Type: Journal Article
• Authors: Villard, P.; Thabuis, T.; Belleville, M.; Sicard, G.; Decaens, G.; Zecri, M.
• Other Names: Traversi Gianluca Academic Editor.
• Is Part Of: Active and passive electronic components. Volume 2012(2012)
• Publication Date: 2012-04-09
• Subjects: Electronics -- Periodicals; Passive components -- Periodicals; Electronic apparatus and appliances -- Periodicals; 621.381505
• DOI: 10.1155/2012/610176
• Languages: English
• ISSNs: 0882-7516

Abstract

Abstract : A decorrelation and analog-to-digital conversion scheme aiming to reduce the power consumption of infrared image sensors is presented in this paper. To exploit both intraframe redundancy and inherent photon shot noise characteristics, a column based 1D Haar analog wavelet transform combined with variable gain amplification prior to A/D conversion is used. This allows to use only an 11-bit ADC, instead of a 13-bit one, and to save 15% of data transfer. An8 × 16 pixels test circuit demonstrates this functionality.