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Timeline of Denis Sallin

2015
Feb
15
Published new article




Article

Toward direct light-to-digital conversion using a pulse-driven hybrid MOS-PN photodetector.

Published: 15 February 2015 in Optics Letters

doi:

In this Letter, a direct light-to-digital converter based on an MOS-PN photodetector driven by pulsed voltage is presented. The objective is to avoid any analog-to-digital or time-to-digital conversion and, thereby, to pave the way for a new generation of fully digital imaging sensors with reduced complexity, area, and power consumption. Moreover, the pulsed voltage operation allows for a significant reduction of the dark level. The concept is validated by a theoretical study and TCAD simulations. A first prototype fabricated in 0.18 μm CMOS technology is presented. The experimental results under various light conditions show that the pulsed voltage improves the light sensitivity by several orders of magnitude.

0 Reads | 0 Citations
2015
Feb
13
Published new article




Article

Toward direct light-to-digital conversion using a pulse-driven hybrid MOS-PN photodetector

Published: 13 February 2015 by The Optical Society in Optics Letters

doi: 10.1364/ol.40.000669

In this Letter, a direct light-to-digital converter based on an MOS-PN photodetector driven by pulsed voltage is presented. The objective is to avoid any analog-to-digital or time-to-digital conversion and, thereby, to pave the way for a new generation of fully digital imaging sensors with reduced complexity, area, and power consumption. Moreover, the pulsed voltage operation allows for a significant reduction of the dark level. The concept is validated by a theoretical study and TCAD simulations. A first prototype fabricated in 0.18 μm CMOS technology is presented. The experimental results under various light conditions show that the pulsed voltage improves the light sensitivity by several orders of magnitude.

2 Reads | 0 Citations
2014
Oct
15
Published new article




Article

MOS-PN Hybrid Device With Minimum Dark Current for Sensitive Digital Photodetection

Published: 15 October 2014 by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters

doi: 10.1109/lpt.2014.2346812

This letter presents a CMOS-compatible photodetector displaying direct light-to-time conversion and intrinsic charge integration with a very low dark current. This device is particularly adapted for applications requiring high sensitivity such as bioluminescence detection. The effects of the physical structure, the process parameters, and the bias conditions on the device are discussed with the support of TCAD simulations and experimental measurements. The photodetector and its readout circuit are designed and implemented in standard 0.18-μm CMOS process. The experimental study shows promising tunability and sensitivity characteristics.

0 Reads | 0 Citations
2014
Jun
16
Published new article




Article

Hybrid MOS-PN photodiode with positive feedback for pulse-modulation imaging.

Published: 16 June 2014 in Optics Express

doi:

A new type of CMOS compatible photodetector, exhibiting intrinsic light-to-time conversion, is proposed. Its main objective is to start the time-to-digital conversion directly at its output, thereby avoiding the cumbersome analog processing. The operation starts with an internal charge integration, followed by a positive feedback, and a sharp switching-current. The device, consisting of a deeply depleted MOS structure controlling the conduction of a forward-based PN diode, is presented and its operation explained. TCAD simulations are used to show the effects of semiconductor parameters and bias conditions. The photodetector and its detection circuit are designed and fabricated in a 0.18µm CMOS process. Measurements of this new device under different biasing and illumination conditions show highly promising properties in terms of linearity, internal gain, and noise performances.

0 Reads | 0 Citations
2014
Jun
05
Published new article




Article

Hybrid MOS-PN photodiode with positive feedback for pulse-modulation imaging

Published: 05 June 2014 by The Optical Society in Optics Express

doi: 10.1364/oe.22.014441

A new type of CMOS compatible photodetector, exhibiting intrinsic light-to-time conversion, is proposed. Its main objective is to start the time-to-digital conversion directly at its output, thereby avoiding the cumbersome analog processing. The operation starts with an internal charge integration, followed by a positive feedback, and a sharp switching-current. The device, consisting of a deeply depleted MOS structure controlling the conduction of a forward-based PN diode, is presented and its operation explained. TCAD simulations are used to show the effects of semiconductor parameters and bias conditions. The photodetector and its detection circuit are designed and fabricated in a 0.18µm CMOS process. Measurements of this new device under different biasing and illumination conditions show highly promising properties in terms of linearity, internal gain, and noise performances.

0 Reads | 0 Citations
2013
Nov
01
Published new article




Article

An Ultra-High Speed Emulator Dedicated to Power System Dynamics Computation Based on a Mixed-Signal Hardware Platform

Published: 01 November 2013 by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Power Systems

doi: 10.1109/TPWRS.2013.2259186

This paper presents an ultra-high speed hardware platform dedicated to power system dynamic (small signal) and transient (large signal) stability. It is based on an intrinsic parallel architecture which contains hybrid mixed-signal (analog and digital) circuits. For a given model, this architecture overcomes the speed of the numerical simulators by means of the so-called emulation approach. Indeed, the emulation speed does not depend on the power system size. This approach is nevertheless not competing against high-performance numerical simulators in term of accuracy and model complexity. It targets to complement the numerical simulators with the advantage of speed, portability, low cost and autonomous functioning. The proof of concept is a flexible and modular 96-node hardware platform. It is based on a reconfigurable array of power system buses called Field Programmable Power Network System (FPPNS). Details on this hardware are given. Two benchmark topologies with, respectively, 17 nodes and 57 nodes are provided. Comparisons with a digital simulator are done in terms of speed and accuracy. The calibration of the system is explained and different applications are proposed and discussed. The promising results of this hardware platform show that the design of a fully integrated solution containing hundreds of power system buses can be achieved in order to provide a low cost solution.

0 Reads | 0 Citations
2015
Jul
13
Conference participation




Denis Sallin participated at conference 4th International Symposium on Sensor Science.

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