Publication

Optical sensor using a floating body SOI MOSFET in the Delta-sigma loop

Maher Kayal, Jean-Michel Sallese, Louis Harik
2008
Conference Papers

Résumé

In this paper, the partially depleted SOI phototransistor has been used as a light intensity sensor. A pixel implementing the technique elaborated in [1] was designed and implemented on SOI technology. The circuit implements a first order Delta-sigma modulator. Measured data show flux densities as low as 3mW/m2 and an SNR of 60 dB. ©2008 IEEE.

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https://infoscience.epfl.ch/entities/publication/4f76ecb8-d594-4e91-9646-589722fe28f3

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Maher Kayal, Jean-Michel Sallese, Louis Harik
2008
Conference Papers

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/4f76ecb8-d594-4e91-9646-589722fe28f3

À propos de ce résultat

Concepts associés (16)

Pulse-density modulation

Pulse-density modulation, or PDM, is a form of modulation used to represent an analog signal with a binary signal. In a PDM signal, specific amplitude values are not encoded into codewords of pulses of different weight as they would be in pulse-code modulation (PCM); rather, the relative density of the pulses corresponds to the analog signal's amplitude. The output of a 1-bit DAC is the same as the PDM encoding of the signal. In a pulse-density modulation bitstream, a 1 corresponds to a pulse of positive polarity (+A), and a 0 corresponds to a pulse of negative polarity (−A).

Pixel

thumb|upright=1.4|Image numérique dont une portion est très agrandie. Les pixels apparaissent ici comme des petits carrés. Le pixel, souvent abrégé p ou px, est l'unité de base de la définition d'une matricielle. Ce mot provient de la locution anglaise picture element, qui signifie « élément d'image ». Le pixel est l'unité minimale adressable par le contrôleur vidéo. C'est aussi l'unité utilisée pour spécifier les définitions d'affichage (largeur × hauteur).

Active-pixel sensor

An active-pixel sensor (APS) is an , which was invented by Peter J.W. Noble in 1968, where each pixel sensor unit cell has a photodetector (typically a pinned photodiode) and one or more active transistors. In a metal–oxide–semiconductor (MOS) active-pixel sensor, MOS field-effect transistors (MOSFETs) are used as amplifiers. There are different types of APS, including the early NMOS APS and the now much more common complementary MOS (CMOS) APS, also known as the CMOS sensor.

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