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检索条件"任意字段=Conference on Ph.D Research in Microelectronics and Electronics"

共 836 条记录，以下是121-130 订阅

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defect detection in double-Sided Cooled Power Modules by Structure Functions

Defect Detection in Double-Sided Cooled Power Modules by Str...

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ph.d. research in microelectronics and electronics (PRIME)

作者： Ciro Scognamillo Antonio Pio Catalano Vincenzo d’ Alessandro Lorenzo Codecasa Alberto Castellazzi Department of Electrical Engineering and Information Technology University Federico II Naples Italy Department of Electronics Information and Bioengineering Politecnico di Milano Milan Italy Solid-State Power Processing Lab Kyoto University of Advanced Science Kyoto Japan

This paper presents an approach based on structure functions aimed to the defect detection in state-of-the-art double-sided cooled power modules. The investigation is conducted by means of highly detailed 3-d finite-element method thermal simulations on the exact replica of a power module. Typical defects are emulated ad-hoc in the numerical environment: solder delamination, detached interconnections, and voids/bubbles in the thermal interface material. It is demonstrated that assigned defects give specific shapes to the structure functions; once these shapes are classified, the nature of the defects can be easily unraveled from experimental data.

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An Impedance Characterisation Circuit for Implantable research Platforms

An Impedance Characterisation Circuit for Implantable Resear...

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ph.d. research in microelectronics and electronics (PRIME)

作者： Vichaya Manatchinapisit Peilong Feng Lijie Xie Timothy G. Constandinou Department of Electrical and Electronic Engineering Imperial College London UK Care Research & Technology Centre Imperial College London UK Dementia Research Institute Mint Neurotechnologies Ltd London UK

ISBN: (数字)9798350386301

ISBN: (纸本)9798350386318

Neuromodulation devices use stimulation to inject current through electrodes to modulate the activity of tissue for therapeutic benefit. Complex electrochemical processes happening at the electrode-tissue interface pose a challenge in ensuring long-term safety to avoid corrosion and tissue damage. Convention devices such as deep brain stimulators (dBS) providing constant, tonic stimulation patterns can be designed to operate within a safe window by controlling parameters. Recent de-vices providing closed-loop stimulation, for example, dynamically adjusting stimulation based on neural activity. Furthermore, research platforms configure devices for new neural targets, and new therapies and can use different electrodes. To ensure safe operation and to mitigate potentially hazardous states, it is now essential to monitor electrode properties. Electrochemical impedance spectroscopy (EIS) is a valuable technique for characterizing electrode properties, such as charge transfer and surface integrity. This paper describes a circuit for achieving in situ characterisation of electrode impedance using EIS. The circuit generates and injects a microamp-level sinusoidal test current, measures the voltage waveform, and sweeps frequency to obtain an impedance spectrum. This has been implemented in an integrated circuit technology for future integration within an implantable research platform. The design has been verified through circuit simulation, using a realistic model for a dBS electrode that has been experimentally characterised.

关键词： Electrodes Semiconductor device modeling Voltage measurement Impedance measurement Satellite broadcasting Silicon Frequency measurement

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Resilient Massive Access assisted ISAC in Space-Air-Ground Integrated Networks 30

Resilient Massive Access assisted ISAC in Space-Air-Ground I...

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30th International conference on Mobile Computing and Networking, ACM MobiCom 2024

作者： Chen, Jiabin Xie, Wupeng Wang, Chaowei Pang, Mingliang Jiang, Fan Xu, Lexi Beijing University of Posts and Telecommunications Beijing China Artificial Intelligence Institute of China Electronics Technology Group Corporation Beijing China Xi'an University of Posts and Telecommunications Xi'an China China United Network Communications Corporation Beijing China

ISBN: (纸本)9798400704895

Integrated sensing and communication (ISAC) and space-air-ground integrated networks (SAGIN) have been considered as key technologies of 6G. The challenge of achieving ISAC in uplink massive access scenarios within the SAGIN has become a major research topic. This paper introduces the Resilient Massive Access (RMA) protocol, which deeply integrates S-ALOHA and NOMA, effectively enhancing the system's access success probability. Additionally, a cascaded uplink detection algorithm based on LS and MUSIC (MUSIC-NOMA-TSA) is proposed, enabling signal decoding and target sensing even in the presence of collisions at the receiver. Simulation results demonstrate that, compared to traditional algorithms, the proposed algorithm not only achieves more accurate signal decoding and target sensing but also significantly improves the access success probability. © 2024 Copyright is held by the owner/author(s). Publication rights licensed to ACM.

关键词： decoding

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design and Characterization of an Active Low-Pass Envelope detector for Wake-Up Radio Receivers

Design and Characterization of an Active Low-Pass Envelope D...

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ph.d. research in microelectronics and electronics (PRIME)

作者： Alessia Maria Elgani Matteo d’ Addato Luca Perilli Eleonora Franchi Scarselli Roberto Canegallo ARCES-DEI University of Bologna Bologna Italy STMicroelectronics Italy Agrate Brianza Italy

This paper presents a design flow for an active low-pass (LP) Envelope detector (Ed) for Wake-Up Radio (WUR) receivers and provides insight on the well-known bitrate-sensitivity-current trade-off and on additional aspects which may be critical in Internet of Things (IoT) applications, such as maximum receivable input power and robustness against Continuous Wave (CW) interferers. The implemented LP Ed, designed using the STmicroelectronics 90-nm BCd technology, receives 400-bit OOK-modulated packets with an 868-MHz carrier frequency and achieves −35.5-dBm sensitivity with a 2.7-nW power consumption. Finally, it receives input power levels up to 15 dBm and achieves 22-dB Signal-to-Interference Ratio (SIR) with a CW interferer with a 100-kHz frequency offset.

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Study the effect of different modulation schemes on high speed optical fiber links with CFBG based dispersion compensation 4

Study the effect of different modulation schemes on high spe...

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4th International conference on Advances in Electrical, Computing, Communication and Sustainable Technologies, ICAECT 2024

作者： Sreeragi, G.R. Vijayakumar, N. Pradeep, R. Bartonhill Apj Abdul Kalam Technological University Govt. Engineering College Dept. of Electronics and Communication Thiruvananthapuram India University of Kerala Board of Studies Thiruvananthapuram India College of Engineering Dept. of Electronics and Communication Thiruvananthapuram India

ISBN: (纸本)9798350343670

In this paper, the performance of different modulation schemes, namely, Return-to-Zero (RZ), Non-Return-to-Zero (NRZ), and duo-binary schemes are analyzed on a 20 Gbps optical transmission system with dispersion compensation. Here, we have attempted to address the challenges in the design of dispersion compensation module by exploring the unique features of Chirped Fiber Bragg Grating (CFBG). This was achieved by using a single CFBG with proper apodization and finest optimization of its various design parameters. A simulative analysis of the designed system over 100 km length Single Mode Fiber (SMF) has been carried out and the system performance is evaluated based on Q-Factor, and BER values of the received signal. The study further explores the performance of these modulation schemes under varying input signal power. From the simulation results, it can be observed that duo-binary modulation provides better performance over other modulation schemes for input signal power beyond 4 dBm. Hence, for a 20 Gbps IM-dd system, duo-binary modulation gives superior performance over RZ and NRZ schemes. © 2024 IEEE.

关键词： Bit error rate Chirped Fiber Bragg Grating dispersion duo-binary modulation Erbium doped fiber amplifier Intensity-Modulated direct detection system Mach-Zehnder Modulator Non-Return-to-Zero Return-to-Zero

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A Compact Embedded System for Time-Based Electrochemical Impedance Spectroscopy of Gas Sensors

A Compact Embedded System for Time-Based Electrochemical Imp...

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ph.d. research in microelectronics and electronics (PRIME)

作者： Antonio Vincenzo Radogna Simonetta Capone Luca Francioso Pietro Aleardo Siciliano Stefano d’ Amico National Research Council (CNR) Institute for Microelectronics and Microsystems (IMM) Lecce Italy Department of Engineering for Innovation University of Salento Lecce Italy

In this work, a compact embedded system for time-based EIS of gas sensors is presented. differently from other works, which rely mostly on laboratory instrumentation, the proposed system proves that fast EIS measurements can be implemented on reduced size hardware with minimal employment of on-board components. These goals are achieved thanks to the implementation of the MLS-based measurement technique on a programmable system-on-chip (PSoC) device. In particular, the IR of the sensor is measured by driving it with an MLS excitation signal, thus performing the digital cross-correlation between the input and the output. The selected PSoC device allows the implementation of the digital circuits, the microcontroller and the analog front-end in the same device. As a benefit, the bill of onboard components is extremely reduced. The system architecture and operation are presented in detail and the experimental measurements, obtained by testing a parallel RC as sensor circuit model, are shown. The accuracy between different measurements is evaluated by computing the Pearson’s correlation coefficient for each measured IR.

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StrongArm-Latch-Based Receiver for Supply Line Embedded Communication

StrongArm-Latch-Based Receiver for Supply Line Embedded Comm...

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ph.d. research in microelectronics and electronics (PRIME)

作者： Federico d’ Aniello Andreas Ott Andrea Baschirotto Dept. of Physics &#x201C G. Occhialini&#x201D Univ. Milan-Bicocca - Milan (Italy) Melexis GmbH Erfurt Germany

A PLC receiver based on a StrongArm Latch with tunable hysteresis is developed to realize a supply line embedded transceiver for automotive application. Modern cars are complex systems with a huge number of distributed Electronic Control Units (ECUs) with several sensors and actuators. As automotive systems became more complex, new solutions to drastically reduce the amount of cabling must be developed. A supply embedded communication method can be used to decrease weight, cost, and raw materials usage. A key block of the required transceiver is the here proposed receiver that is based on a StrongArm Latch with tunable hysteresis to guarantee performance robustness and circuit sensitivity. A differential buffer and an input divider are used in front of the Latch to provide a fast, stable, and manageable signal. The full transceiver is developed in a 180nm CMOS SOI technology. Extended simulations in an automotive environment model validate the receiver proposal.

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An Integrated Multi-Order digital Control Unit for Maximum Length Sequence Circulant Matrix Generation

An Integrated Multi-Order Digital Control Unit for Maximum L...

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ph.d. research in microelectronics and electronics (PRIME)

作者： Antonio Vincenzo Radogna Simonetta Capone Luca Francioso Pietro Aleardo Siciliano Stefano d’ Amico Institute for Microelectronics and Microsystems (IMM) National Research Council (CNR) Lecce Italy Department of Engineering for Innovation University of Salento Lecce Italy

In this work an integrated multi-order digital control unit (dCU), for the generation of a maximum length sequence (MLS) circulant matrix, is proposed. The system provides the binary MLS through serial output. It has the possibility to select the M order of the MLS according to the application. When compared to conventional implementations, the proposed system does not rely on read-only memory (ROM) data storage since the circulant sequences are generated on the fly during the circuit’s operation. This permits to implement multiple order circulant matrices, while mantaining a reduced area occupation. Moreover, the proposed circuit can be implemented with digital standard cell synthesis, avoiding dedicated digital flows for memories. The dCU has been verified with behavioral simulation using a 2MHz clock frequency and has been realized in CMOS $28\mathrm{~nm}$ FdSOI technology with a total area occupation of $45\mu\mathrm{m}\times 45\mu\mathrm{m}$. From the RTL synthesis, a total power consumption of $8.2\mu\mathrm{W}$ is obtained.

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Electrical Model of a Wireless mW-Power and Mbps-data Transfer System Over a Single Pair of Coils

Electrical Model of a Wireless mW-Power and Mbps-Data Transf...

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ph.d. research in microelectronics and electronics (PRIME)

作者： david Palomeque-Mangut Alexandre Schmid Á ngel Rodrd guez-Vá zquez Manuel delgado-Restituto Seville Institute of Microelectronics (CSIC-Universidad de Sevilla) Seville Spain Swiss Federal Institute of Technology Lausanne (EPFL) Lausanne Switzerland

This paper proposes a system to transfer both mW-power and Mbps-data over an inductive link using a single pair of coils. The system is able to handle a wide range of loads by implementing a load adapter block that divides the operation into two phases: a Power Transfer phase (PTP) and a data Transfer phase (dTP). On the one hand, during PTP, a constant amount of power is drawn from the inductive link, regardless of the current demanded by the load. On the other hand, during dTP, the load is powered with external capacitors, allowing the inductive link to be used for data transmission. With this architecture, intended to be used in a neural implant, power can be delivered to a wide range of loads without affecting the uplink/downlink data communication reliability and with no need of extra coils. Thus, the proposed solution permits minimizing the overall size of the neural implant. An electrical mixed-signal model of the system is described and implemented in MATLAB Simulink through Simscape Electrical and Stateflow toolboxes. Simulations performed on the electrical model of the system are shown and discussed.

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Recent advances on the fabrication of superwettable layered double hydroxides materials for oil-water separation

Recent advances on the fabrication of superwettable layered ...

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2023 International conference on Advances in Materials, Mechanics, Mechatronics and Manufacturing, IC4M 2023

作者： Kalusulingam, Rajathsing Koilraj, Paulmanickam Antonyraj, Churchil Angel Srinivasan, Kannan Gujarat Bhavnagar364002 India Uttar Pradesh Ghaziabad201002 India Laboratory of Functional Nanomaterials Technology Institute of Nanotechnologies Electronics and Electronic Equipment Engineering Southern Federal University Taganrog347922 Russia Department of Chemistry PSG College of Arts & Science Tamil Nadu Coimbatore641004 India

Fast industrialization and infrastructural development have increased the use of fossil fuels, leading to frequent oil spills during mining and/or marine transportation produces oily wastewater. Everywhere in the world, oil spills poses a serious global environmental problem and is considered an environmental disaster. Hence, there is a need to find an efficient way to treat oil-water separation, and a recent approach is through the use of functional materials. Emerging studies suggest that superhydrophobic materials have great potential for the separation of oil-water. In this review discusses the potential of superwettable materials, especially superwettable layered double hydroxides (LdHs) materials for efficient oil-water separation. Superwettable LdHs demonstrate various mechanism for water and oil removal, such as superhydrophilicity/superoleophobicity, superhydrophobicity/superoleophilicity, sedimentation/flocculation or adsorption, and oil mopping. Also this review highlight LdHs capability and their role in achieving superwettability during oil-water separation, addressing challenges and briefly discusses the future research direction in this promising area. Copyright © 2024 Elsevier Ltd. All rights reserved.

关键词： Fossil fuels

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