Edith Kussener - Academia.edu (original) (raw)

Papers by Edith Kussener

Abstract-This paper presents a resistor-free temperature compensated CMOS current reference desig... more Abstract-This paper presents a resistor-free temperature compensated CMOS current reference designed in a standard 0.18 ȝm CMOS process. The temperature compensation scheme is achieved by combining a PTC (Positive Temperature Coefficient) current generator circuit with a NTC (Negative Temperature Coefficient) current generator circuit. The proposed design is shown to be less sensitive to process and temperature variations and well suited for integration into other circuits as an accurate and stable current source. Simulation results for the proposed current reference show a temperature coefficient of 170 ppm/°C over a temperature range of -20 °C to 120 °C and an output current variation of 3% over a power supply range of 2 V to 3 V.

2018 IEEE International Conference on Internet of Things and Intelligence System (IOTAIS)

An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented... more An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented in this paper. Focused on environmental or military Internet of Things (IoT) applications, it aims at detecting in real time the presence of specific animal species or drones for generating alerts and for triggering power consuming tasks such as high frequency signal recording only when needed. This wake-up detector continuously monitors the presence of specific frequencies in an analog acoustic signal, with a good frequency selectivity and a high frequency detection capability. It is based on an ultra-low analog frequency to voltage converter using a current-mirror, analog timers and comparators. Dedicated to long term stealth environmental or military surveys, a strong emphasis has been put on power consumption reduction in order to limit size and weight of the system. This power consumption has been reduced to 34μW, leading to a full year of autonomy including the microphone when powered by 3 coin cell CR2032 batteries.

2018 IEEE International Conference on Internet of Things and Intelligence System (IOTAIS)

Being used for synchronizing and triggering environmental and military Internet of Things (IoT) w... more Being used for synchronizing and triggering environmental and military Internet of Things (IoT) wireless networks, an ultra low power wake-up system based on frequency analysis is presented in this paper. With an average power consumption of 34μW, this wake-up detector is able to detect signals in different frequency bands, generating a separate output interrupt for each of them. Adding an additional frequency band detector only costs an additional 500nA. Applications to data retrieval in a military smart dust using a drone on a battlefield, and for activation and synchronization of a environmental wireless sensor network are presented. This later uses a multi-frequency light pulses burst propagation algorithm for triggering a whole wireless sensor network in harsh conditions such as a dense rain forest in 50ms, and for synchronizing it with a timing precision of less than 20μs in a large network.

Journal of Low Power Electronics and Applications

Within an increasingly connected world, the exponential growth in the deployment of Internet of T... more Within an increasingly connected world, the exponential growth in the deployment of Internet of Things (IoT) applications presents a significant challenge in power and data transfer optimisation. Currently, the maximization of Radio Frequency (RF) system power gain depends on the design of efficient, commercial chips, and on the integration of these chips by using complex RF simulations to verify bespoke configurations. However, even if a standard 50Ω transmitter’s chip has an efficiency of 90%, the overall power efficiency of the RF system can be reduced by 10% if coupled with a standard antenna of 72Ω. Hence, it is necessary for scalable IoT networks to have optimal RF system design for every transceiver: for example, impedance mismatching between a transmitter’s antenna and chip leads to a significant reduction of the corresponding RF system’s overall power efficiency. This work presents a versatile design framework, based on well-known theoretical methods (i.e., transducer gain,...

The circuit has a linear regulator (4`) for supplying a DC supply voltage (Vdd) to an internal lo... more The circuit has a linear regulator (4`) for supplying a DC supply voltage (Vdd) to an internal load (29) from an external voltage (Vps). Chopper type capacitive clipping supply circuits (5), with switched capacitances, are in parallel with the activated linear regulator. The circuits supply current at the same time as the linear regulator, during an operation phase (D) of the integrated circuit which corresponds to a phase in which a calculating processor which contains the internal load is active.. An independent claim is also included for a method for scrambling the current signature of a load including an integrated circuit.

Journal of Low Power Electronics and Applications, 2021

Within an increasingly connected world, the exponential growth in the deployment of Internet of T... more Within an increasingly connected world, the exponential growth in the deployment of Internet of Things (IoT) applications presents a significant challenge in power and data transfer optimisation. Currently, the maximization of Radio Frequency (RF) system power gain depends on the design of efficient, commercial chips, and on the integration of these chips by using complex RF simulations to verify bespoke configurations. However, even if a standard 50Ω transmitter’s chip has an efficiency of 90%, the overall power efficiency of the RF system can be reduced by 10% if coupled with a standard antenna of 72Ω. Hence, it is necessary for scalable IoT networks to have optimal RF system design for every transceiver: for example, impedance mismatching between a transmitter’s antenna and chip leads to a significant reduction of the corresponding RF system’s overall power efficiency. This work presents a versatile design framework, based on well-known theoretical methods (i.e., transducer gain,...

2020 IEEE International Reliability Physics Symposium (IRPS), 2020

Extended Drain MOS (EDMOS) transistors were studied about hot-carrier (HC) degradation and its in... more Extended Drain MOS (EDMOS) transistors were studied about hot-carrier (HC) degradation and its involvement in hard breakdown (BD) events as these smart power devices represent a big challenge to optimize under Off/On mode switching in RF circuits. N-channel devices with gate-length LG=0.5µm and two gate-oxide thicknesses were tested Tox= 2.3nm (GO1) and 8.5nm (GO2). The sensitivity to BD between Off-mode and HC is pointed out in GO1 through the hot-hole injections (HHI) that are involved as a function of gate-voltage VGS = VTH and VGmax where the VTH case induces HC damage that can be used with series resistance increase (ΔRSD ) to detect BD events in the drift region. Hole trapping and interface traps are generated leading to the dominant effect of HHI, with very close generation rates between Off- and On- mode stressing. This can be used to prevent circuit aging giving warning level for confidence in AC lifetime for power amplifiers class E and class A.

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2020

This paper presents a smart embedded Functional Electrical Stimulator (FES), able to stimulate a ... more This paper presents a smart embedded Functional Electrical Stimulator (FES), able to stimulate a muscle only when a specific movement pattern occurs. This pattern is detected using an inertial measurement unit (IMU) coupled with a feature detector and a neural classifier. Architecture of the FES is first presented, then embedded processing algorithms composed of feature extraction and neural network classification are detailed. Results show that the muscle vibration happening when stimulation is needed can be recognized in more than 90% of cases using less than 3% of average embedded processor resources on a ARM M4F.

The circuit has a linear regulator (4``) between a ground terminal (22) of an internal load (29) ... more The circuit has a linear regulator (4``) between a ground terminal (22) of an internal load (29) and a terminal (32) connected to the ground of an external supply voltage source (Vps). The regulator is in parallel with capacitive clipping circuits (5`) having switched capacitances. The circuits (5`) are activated, in an operation phase (D) of the integrated circuit, at the same time as the regulator. The operation phase (D) corresponds to a phase in which a calculating processor which contains the internal load (29) is active. An INDEPENDENT CLAIM is also included for a method for scrambling the current signature of a load including an integrated circuit.

2018 14th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications (MESA)

Being used in for environmental and military Internet of Things (IoT), a low power wake-up system... more Being used in for environmental and military Internet of Things (IoT), a low power wake-up system based on frequency analysis is presented in this paper. It aims at detecting continuously the presence of specific very high frequencies in the input acoustic signal of an embedded system. This can be used for detecting specific animal species, and for triggering a recording system or generating alerts. Used for harmful species detection, this helps to save harvests or to protect strict nature reserves. It can also be used for detecting the presence of drones in a specific restricted area. This acoustic low power wake-up system uses a simple 16 bits micro-controller (MCU), with a strong emphasis on the low power management of the system, having a target of continuous detection for at least one year on a single standard 1.2Ah-12V lead battery. For that, it makes the most of mixed analog and digital low power MCU modules. They are including comparators, timers and a special one present on Microchip MCU, called Charge Time Measurement Unit (CTMU). This is a driven constant current source for making time to frequency conversions at a very low power and algorithmic cost. Optimizing low power modes, this low power wake-up system based on frequency analysis has a power consumption of 0.56mW , leading to approximately 3 years of battery life on a single standard 1.2Ah-12V lead cell.

2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)

An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented... more An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented in this paper. Focused on environmental or military Internet of Things (IoT) applications, it aims at detecting in real time the presence of specific animal species or drones for generating alerts and for triggering power consuming tasks such as high frequency signal recording only when needed.This wake-up detector continuously monitors the presence of specific frequencies in an analog acoustic signal, with a good frequency selectivity and a high frequency range detection capability. It is based on an ultra-low power analog frequency to voltage converter using a current-mirror, analog timers and synchronous comparators.Dedicated to long term stealth environmental or military surveys, a strong emphasis has been put on power consumption reduction in order to reduce batteries constraints. Its power consumption has been reduced to 2.5µW, leading to an autonomy of more than 28 years with a single coin cell CR2032 battery.

Microelectronics Reliability

Abstract P- and N- channel Extended Drain MOSFETs (EDMOS) are analyzed through its sensitivity to... more Abstract P- and N- channel Extended Drain MOSFETs (EDMOS) are analyzed through its sensitivity to Hot-Carrier (HC) degradation using accelerated lifetime technique. N- and P- channel EDMOS are optimized for a gate-length LG = 0.5 μm, with gate-oxide thickness at 2.3 nm. We have evaluated more precisely the HC damage caused from channel to the extended drain by an improved extraction of series resistance (ΔRSD) till a 2nd order mobility modeling as a function of stressing VGS from VGS = 0 to VGmax. This allows to determine the worst-case of lifetime dependence in relation to the damage in the drift zone where breakdown sensitivity is found to be intimately bound up with the hot-hole (HH) injection efficiency in N-EDMOS while P-EDMOS exhibits a larger security margin.

J3eA, 2017

Dans le cadre de la formation à l'ISEN Toulon, les étudiants de première année de Master ont pour... more Dans le cadre de la formation à l'ISEN Toulon, les étudiants de première année de Master ont pour mission de réaliser un projet sur une durée de 300h. Ce projet a eu pour vocation première la réalisation d'un produit en utilisant les outils d'aide à la simulation proposés par le CNFM, mais également les outils de gestion de projets. Dans ce cadre, les étudiants encadrés par des enseignants-chercheurs de différents sites (ISEN Toulon, Polytech'Marseille, le Laboratoire IM2NP, l'EMSE), ont développé une source aléatoire intégrée faible consommation. La conception a été réalisée par les étudiants sur le site de l'ISEN Toulon et Polytech Marseille et les tests sécuritaires ont été effectués sur le site de l'Ecole des Mines de Saint Etienne, à Gardanne. Ce projet multi site est une réelle plus-value pour les étudiants comme pour les encadrants.

2018 14th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications (MESA), Jul 1, 2018

Being used in for environmental and military Internet of Things (IoT), a low power wake-up system... more Being used in for environmental and military Internet of Things (IoT), a low power wake-up system based on frequency analysis is presented in this paper. It aims at detecting continuously the presence of specific very high frequencies in the input acoustic signal of an embedded system. This can be used for detecting specific animal species, and for triggering a recording system or generating alerts. Used for harmful species detection, this helps to save harvests or to protect strict nature reserves. It can also be used for detecting the presence of drones in a specific restricted area. This acoustic low power wake-up system uses a simple 16 bits micro-controller (MCU), with a strong emphasis on the low power management of the system, having a target of continuous detection for at least one year on a single standard 1.2Ah-12V lead battery. For that, it makes the most of mixed analog and digital low power MCU modules. They are including comparators, timers and a special one present on Microchip MCU, called Charge Time Measurement Unit (CTMU). This is a driven constant current source for making time to frequency conversions at a very low power and algorithmic cost. Optimizing low power modes, this low power wake-up system based on frequency analysis has a power consumption of 0.56mW , leading to approximately 3 years of battery life on a single standard 1.2Ah-12V lead cell.

International Journal of Electronics Letters

ABSTRACT The voltage feedback operational amplifier (VFOA) and the current feedback operational a... more ABSTRACT The voltage feedback operational amplifier (VFOA) and the current feedback operational amplifier (CFOA) are the main voltage type output opamps currently used in electronics. The VFOA is a combination of an operational transconductance amplifier (OTA) used as an input stage and an output voltage buffer (VB). In this paper, the CFOA is described as a combination of an operational transconductance conveyor (OTC) used as an input stage and with an output voltage buffer. Two similar CMOS architectures are then defined, analysed and simulated in order to provide some elements of comparison. Results, from a typical CMOS 0.35μm transistor parameters, show the role of compensation capacitances in boosting the frequency performances of the non-inverting amplifier.

IEEE Transactions on Instrumentation and Measurement

This paper presents a radio frequency (RF) measurement method that allows to determine electrical... more This paper presents a radio frequency (RF) measurement method that allows to determine electrical characteristics such as scattering parameters or impedance of contactless passive chips, using common measurement devices such as oscilloscope, personal computer, and directional coupler. The measurements obtained using this method are as accurate as those obtained with vector network analyzer (VNA) measurements, while providing several improvements. First, the method makes it possible to measure a chip’s impedance in activation state, which requires large input power, not compatible with VNA measurements. Second, this method realizes a real-time measurement, which consists in impedance measurement as a function of time. Therefore, this real-time measurement makes it possible to detect and measure the impedance changes of an actual contactless smart card’s integrated circuit during a load modulation communication at different powers. Finally, this real-time impedance measurement gives important information on chips’ electrical characteristics that can be used to optimize near-field communication devices design in order to reduce the power losses within an RF identification tag.

Proceedings of the 2016 Design, Automation & Test in Europe Conference & Exhibition (DATE), 2016

This paper presents a study on the effect of Forward Body Biasing on the laser fault sensitivity ... more This paper presents a study on the effect of Forward Body Biasing on the laser fault sensitivity of a CMOS 90 nm microcontroller. Tests were performed on a register of this target, under several supply voltage and body bias settings, showing significant laser sensitivity variations. Based on these results, a method which aims at decreasing fault repeatability by using variable supply voltage and body bias settings is proposed. Finally, tests are performed on an implementation of this method on a temporally redundant AES and the results are presented.

Abstract-This paper presents a resistor-free temperature compensated CMOS current reference desig... more Abstract-This paper presents a resistor-free temperature compensated CMOS current reference designed in a standard 0.18 ȝm CMOS process. The temperature compensation scheme is achieved by combining a PTC (Positive Temperature Coefficient) current generator circuit with a NTC (Negative Temperature Coefficient) current generator circuit. The proposed design is shown to be less sensitive to process and temperature variations and well suited for integration into other circuits as an accurate and stable current source. Simulation results for the proposed current reference show a temperature coefficient of 170 ppm/°C over a temperature range of -20 °C to 120 °C and an output current variation of 3% over a power supply range of 2 V to 3 V.

2018 IEEE International Conference on Internet of Things and Intelligence System (IOTAIS)

An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented... more An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented in this paper. Focused on environmental or military Internet of Things (IoT) applications, it aims at detecting in real time the presence of specific animal species or drones for generating alerts and for triggering power consuming tasks such as high frequency signal recording only when needed. This wake-up detector continuously monitors the presence of specific frequencies in an analog acoustic signal, with a good frequency selectivity and a high frequency detection capability. It is based on an ultra-low analog frequency to voltage converter using a current-mirror, analog timers and comparators. Dedicated to long term stealth environmental or military surveys, a strong emphasis has been put on power consumption reduction in order to limit size and weight of the system. This power consumption has been reduced to 34μW, leading to a full year of autonomy including the microphone when powered by 3 coin cell CR2032 batteries.

2018 IEEE International Conference on Internet of Things and Intelligence System (IOTAIS)

Being used for synchronizing and triggering environmental and military Internet of Things (IoT) w... more Being used for synchronizing and triggering environmental and military Internet of Things (IoT) wireless networks, an ultra low power wake-up system based on frequency analysis is presented in this paper. With an average power consumption of 34μW, this wake-up detector is able to detect signals in different frequency bands, generating a separate output interrupt for each of them. Adding an additional frequency band detector only costs an additional 500nA. Applications to data retrieval in a military smart dust using a drone on a battlefield, and for activation and synchronization of a environmental wireless sensor network are presented. This later uses a multi-frequency light pulses burst propagation algorithm for triggering a whole wireless sensor network in harsh conditions such as a dense rain forest in 50ms, and for synchronizing it with a timing precision of less than 20μs in a large network.

Journal of Low Power Electronics and Applications

Within an increasingly connected world, the exponential growth in the deployment of Internet of T... more Within an increasingly connected world, the exponential growth in the deployment of Internet of Things (IoT) applications presents a significant challenge in power and data transfer optimisation. Currently, the maximization of Radio Frequency (RF) system power gain depends on the design of efficient, commercial chips, and on the integration of these chips by using complex RF simulations to verify bespoke configurations. However, even if a standard 50Ω transmitter’s chip has an efficiency of 90%, the overall power efficiency of the RF system can be reduced by 10% if coupled with a standard antenna of 72Ω. Hence, it is necessary for scalable IoT networks to have optimal RF system design for every transceiver: for example, impedance mismatching between a transmitter’s antenna and chip leads to a significant reduction of the corresponding RF system’s overall power efficiency. This work presents a versatile design framework, based on well-known theoretical methods (i.e., transducer gain,...

The circuit has a linear regulator (4`) for supplying a DC supply voltage (Vdd) to an internal lo... more The circuit has a linear regulator (4`) for supplying a DC supply voltage (Vdd) to an internal load (29) from an external voltage (Vps). Chopper type capacitive clipping supply circuits (5), with switched capacitances, are in parallel with the activated linear regulator. The circuits supply current at the same time as the linear regulator, during an operation phase (D) of the integrated circuit which corresponds to a phase in which a calculating processor which contains the internal load is active.. An independent claim is also included for a method for scrambling the current signature of a load including an integrated circuit.

Journal of Low Power Electronics and Applications, 2021

Within an increasingly connected world, the exponential growth in the deployment of Internet of T... more Within an increasingly connected world, the exponential growth in the deployment of Internet of Things (IoT) applications presents a significant challenge in power and data transfer optimisation. Currently, the maximization of Radio Frequency (RF) system power gain depends on the design of efficient, commercial chips, and on the integration of these chips by using complex RF simulations to verify bespoke configurations. However, even if a standard 50Ω transmitter’s chip has an efficiency of 90%, the overall power efficiency of the RF system can be reduced by 10% if coupled with a standard antenna of 72Ω. Hence, it is necessary for scalable IoT networks to have optimal RF system design for every transceiver: for example, impedance mismatching between a transmitter’s antenna and chip leads to a significant reduction of the corresponding RF system’s overall power efficiency. This work presents a versatile design framework, based on well-known theoretical methods (i.e., transducer gain,...

2020 IEEE International Reliability Physics Symposium (IRPS), 2020

Extended Drain MOS (EDMOS) transistors were studied about hot-carrier (HC) degradation and its in... more Extended Drain MOS (EDMOS) transistors were studied about hot-carrier (HC) degradation and its involvement in hard breakdown (BD) events as these smart power devices represent a big challenge to optimize under Off/On mode switching in RF circuits. N-channel devices with gate-length LG=0.5µm and two gate-oxide thicknesses were tested Tox= 2.3nm (GO1) and 8.5nm (GO2). The sensitivity to BD between Off-mode and HC is pointed out in GO1 through the hot-hole injections (HHI) that are involved as a function of gate-voltage VGS = VTH and VGmax where the VTH case induces HC damage that can be used with series resistance increase (ΔRSD ) to detect BD events in the drift region. Hole trapping and interface traps are generated leading to the dominant effect of HHI, with very close generation rates between Off- and On- mode stressing. This can be used to prevent circuit aging giving warning level for confidence in AC lifetime for power amplifiers class E and class A.

2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2020

This paper presents a smart embedded Functional Electrical Stimulator (FES), able to stimulate a ... more This paper presents a smart embedded Functional Electrical Stimulator (FES), able to stimulate a muscle only when a specific movement pattern occurs. This pattern is detected using an inertial measurement unit (IMU) coupled with a feature detector and a neural classifier. Architecture of the FES is first presented, then embedded processing algorithms composed of feature extraction and neural network classification are detailed. Results show that the muscle vibration happening when stimulation is needed can be recognized in more than 90% of cases using less than 3% of average embedded processor resources on a ARM M4F.

The circuit has a linear regulator (4``) between a ground terminal (22) of an internal load (29) ... more The circuit has a linear regulator (4``) between a ground terminal (22) of an internal load (29) and a terminal (32) connected to the ground of an external supply voltage source (Vps). The regulator is in parallel with capacitive clipping circuits (5`) having switched capacitances. The circuits (5`) are activated, in an operation phase (D) of the integrated circuit, at the same time as the regulator. The operation phase (D) corresponds to a phase in which a calculating processor which contains the internal load (29) is active. An INDEPENDENT CLAIM is also included for a method for scrambling the current signature of a load including an integrated circuit.

2018 14th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications (MESA)

Being used in for environmental and military Internet of Things (IoT), a low power wake-up system... more Being used in for environmental and military Internet of Things (IoT), a low power wake-up system based on frequency analysis is presented in this paper. It aims at detecting continuously the presence of specific very high frequencies in the input acoustic signal of an embedded system. This can be used for detecting specific animal species, and for triggering a recording system or generating alerts. Used for harmful species detection, this helps to save harvests or to protect strict nature reserves. It can also be used for detecting the presence of drones in a specific restricted area. This acoustic low power wake-up system uses a simple 16 bits micro-controller (MCU), with a strong emphasis on the low power management of the system, having a target of continuous detection for at least one year on a single standard 1.2Ah-12V lead battery. For that, it makes the most of mixed analog and digital low power MCU modules. They are including comparators, timers and a special one present on Microchip MCU, called Charge Time Measurement Unit (CTMU). This is a driven constant current source for making time to frequency conversions at a very low power and algorithmic cost. Optimizing low power modes, this low power wake-up system based on frequency analysis has a power consumption of 0.56mW , leading to approximately 3 years of battery life on a single standard 1.2Ah-12V lead cell.

2021 19th IEEE International New Circuits and Systems Conference (NEWCAS)

An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented... more An ultra low power acoustic wake-up detector based on high frequency signal analysis is presented in this paper. Focused on environmental or military Internet of Things (IoT) applications, it aims at detecting in real time the presence of specific animal species or drones for generating alerts and for triggering power consuming tasks such as high frequency signal recording only when needed.This wake-up detector continuously monitors the presence of specific frequencies in an analog acoustic signal, with a good frequency selectivity and a high frequency range detection capability. It is based on an ultra-low power analog frequency to voltage converter using a current-mirror, analog timers and synchronous comparators.Dedicated to long term stealth environmental or military surveys, a strong emphasis has been put on power consumption reduction in order to reduce batteries constraints. Its power consumption has been reduced to 2.5µW, leading to an autonomy of more than 28 years with a single coin cell CR2032 battery.

Microelectronics Reliability

Abstract P- and N- channel Extended Drain MOSFETs (EDMOS) are analyzed through its sensitivity to... more Abstract P- and N- channel Extended Drain MOSFETs (EDMOS) are analyzed through its sensitivity to Hot-Carrier (HC) degradation using accelerated lifetime technique. N- and P- channel EDMOS are optimized for a gate-length LG = 0.5 μm, with gate-oxide thickness at 2.3 nm. We have evaluated more precisely the HC damage caused from channel to the extended drain by an improved extraction of series resistance (ΔRSD) till a 2nd order mobility modeling as a function of stressing VGS from VGS = 0 to VGmax. This allows to determine the worst-case of lifetime dependence in relation to the damage in the drift zone where breakdown sensitivity is found to be intimately bound up with the hot-hole (HH) injection efficiency in N-EDMOS while P-EDMOS exhibits a larger security margin.

J3eA, 2017

Dans le cadre de la formation à l'ISEN Toulon, les étudiants de première année de Master ont pour... more Dans le cadre de la formation à l'ISEN Toulon, les étudiants de première année de Master ont pour mission de réaliser un projet sur une durée de 300h. Ce projet a eu pour vocation première la réalisation d'un produit en utilisant les outils d'aide à la simulation proposés par le CNFM, mais également les outils de gestion de projets. Dans ce cadre, les étudiants encadrés par des enseignants-chercheurs de différents sites (ISEN Toulon, Polytech'Marseille, le Laboratoire IM2NP, l'EMSE), ont développé une source aléatoire intégrée faible consommation. La conception a été réalisée par les étudiants sur le site de l'ISEN Toulon et Polytech Marseille et les tests sécuritaires ont été effectués sur le site de l'Ecole des Mines de Saint Etienne, à Gardanne. Ce projet multi site est une réelle plus-value pour les étudiants comme pour les encadrants.

2018 14th IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications (MESA), Jul 1, 2018

Being used in for environmental and military Internet of Things (IoT), a low power wake-up system... more Being used in for environmental and military Internet of Things (IoT), a low power wake-up system based on frequency analysis is presented in this paper. It aims at detecting continuously the presence of specific very high frequencies in the input acoustic signal of an embedded system. This can be used for detecting specific animal species, and for triggering a recording system or generating alerts. Used for harmful species detection, this helps to save harvests or to protect strict nature reserves. It can also be used for detecting the presence of drones in a specific restricted area. This acoustic low power wake-up system uses a simple 16 bits micro-controller (MCU), with a strong emphasis on the low power management of the system, having a target of continuous detection for at least one year on a single standard 1.2Ah-12V lead battery. For that, it makes the most of mixed analog and digital low power MCU modules. They are including comparators, timers and a special one present on Microchip MCU, called Charge Time Measurement Unit (CTMU). This is a driven constant current source for making time to frequency conversions at a very low power and algorithmic cost. Optimizing low power modes, this low power wake-up system based on frequency analysis has a power consumption of 0.56mW , leading to approximately 3 years of battery life on a single standard 1.2Ah-12V lead cell.

International Journal of Electronics Letters

ABSTRACT The voltage feedback operational amplifier (VFOA) and the current feedback operational a... more ABSTRACT The voltage feedback operational amplifier (VFOA) and the current feedback operational amplifier (CFOA) are the main voltage type output opamps currently used in electronics. The VFOA is a combination of an operational transconductance amplifier (OTA) used as an input stage and an output voltage buffer (VB). In this paper, the CFOA is described as a combination of an operational transconductance conveyor (OTC) used as an input stage and with an output voltage buffer. Two similar CMOS architectures are then defined, analysed and simulated in order to provide some elements of comparison. Results, from a typical CMOS 0.35μm transistor parameters, show the role of compensation capacitances in boosting the frequency performances of the non-inverting amplifier.

IEEE Transactions on Instrumentation and Measurement

This paper presents a radio frequency (RF) measurement method that allows to determine electrical... more This paper presents a radio frequency (RF) measurement method that allows to determine electrical characteristics such as scattering parameters or impedance of contactless passive chips, using common measurement devices such as oscilloscope, personal computer, and directional coupler. The measurements obtained using this method are as accurate as those obtained with vector network analyzer (VNA) measurements, while providing several improvements. First, the method makes it possible to measure a chip’s impedance in activation state, which requires large input power, not compatible with VNA measurements. Second, this method realizes a real-time measurement, which consists in impedance measurement as a function of time. Therefore, this real-time measurement makes it possible to detect and measure the impedance changes of an actual contactless smart card’s integrated circuit during a load modulation communication at different powers. Finally, this real-time impedance measurement gives important information on chips’ electrical characteristics that can be used to optimize near-field communication devices design in order to reduce the power losses within an RF identification tag.

Proceedings of the 2016 Design, Automation & Test in Europe Conference & Exhibition (DATE), 2016

This paper presents a study on the effect of Forward Body Biasing on the laser fault sensitivity ... more This paper presents a study on the effect of Forward Body Biasing on the laser fault sensitivity of a CMOS 90 nm microcontroller. Tests were performed on a register of this target, under several supply voltage and body bias settings, showing significant laser sensitivity variations. Based on these results, a method which aims at decreasing fault repeatability by using variable supply voltage and body bias settings is proposed. Finally, tests are performed on an implementation of this method on a temporally redundant AES and the results are presented.