Publication

Delta-sigma loop based on charge pumping in SOI optical sensor

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/926f9499-1ae2-4d12-89bf-f5c92f655716

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

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/926f9499-1ae2-4d12-89bf-f5c92f655716

À propos de ce résultat

Concepts associés (18)

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).

Circuit intégré à signaux mixtes

A mixed-signal integrated circuit is any integrated circuit that has both analog circuits and digital circuits on a single semiconductor die. Their usage has grown dramatically with the increased use of cell phones, telecommunications, portable electronics, and automobiles with electronics and digital sensors. Integrated circuits (ICs) are generally classified as digital (e.g. a microprocessor) or analog (e.g. an operational amplifier). Mixed-signal ICs contain both digital and analog circuitry on the same chip, and sometimes embedded software.

Modulation de largeur d'impulsion

La modulation de largeur d'impulsions (MLI ; en anglais : Pulse Width Modulation, soit PWM), est une technique couramment utilisée pour synthétiser des signaux pseudo analogiques à l'aide de circuits numériques (tout ou rien, 1 ou 0), ou plus généralement à états discrets. Elle sert à générer un signal pseudo analogique à partir d'un environnement numérique ou analogique pour permettre un traitement de ce signal par des composants en commutation (se comportant comme des interrupteurs ouverts ou fermés).

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