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A 48V to 50-110V Resonant Power-Bus Charger with Reduced Conduction Loss for MHz-Frequency Long-Range LiDAR Driver 14

A 48V to 50-110V Resonant Power-Bus Charger with Reduced Con...

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14th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2025

作者： Ma, Hangxiao Mu, Xuchu Jiang, Yang Zhang, Weihang Zhang, Jincheng Martins, Rui P. Mak, Pui-In University of Macau State Key Laboratory of Analog and Mixed-Signal Vlsi Ime China Um Hetao Ic Research Institute Shenzhen China Xidian University State Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices Xi'an China Universidade de Lisboa Instituto Superior Técnico Lisbon Portugal

ISBN: (纸本)9798331516116

The paper presents a novel power-supply bus charger for Light Detection and Ranging (LiDAR) driver systems in automotive applications. The charger utilizes a proposed synchronous resonant boost topology that responds swiftly to rapid drops in the power bus voltage during periodic laser pulse emission. In contrast to conventional hard-charging-based bus chargers, this approach eliminates hard-charging losses while maintaining robust output level regulation. This technique improves LiDAR driving efficiency across a wide supply bus range, ensuring the generation of high-amplitude, narrow-width pulses. Experimental results with a 48-V input confirm that the proposed design can regulate an output from 50V to 110V. When supplying a 100V bus, the charger attains a 250-ns bus recovery time while supporting a peak driving current of 49A with 2-ns pulse-width for the laser diode, enabling LiDAR emission frequencies to exceed the MHz-level. In addition, measured results demonstrate a significant reduction in overall system power consumption, from 10.2W to 5.09W, compared to the hard-charging-based approach. © 2025 IEEE.

关键词： Electric power utilization

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A 48V to 50-110V Resonant Power-Bus Charger with Reduced Conduction Loss for MHz-Frequency Long-Range LiDAR Driver

A 48V to 50-110V Resonant Power-Bus Charger with Reduced Con...

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Annual IEEE Conference on Applied Power Electronics Conference and Exposition (APEC)

作者： Hangxiao Ma Xuchu Mu Yang Jiang Weihang Zhang Jincheng Zhang Rui P. Martins Pui-In Mak State Key Laboratory of Analog and Mixed-Signal VLSI IME University of Macau Macau China UM Hetao IC Research Institute Shenzhen China State Key Laboratory of Wide Band-Gap Semiconductor Materials and Devices Xidian University Xi’an China Instituto Superior Técnico Universidade de Lisboa Lisbon Portugal

ISBN: (数字)9798331516116

ISBN: (纸本)9798331516123

关键词： Time-frequency analysis Laser radar Power demand Power measurement Resonant frequency Distance measurement Regulation Diode lasers Topology Voltage control

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Optical fiber temperature sensor based on liquid crystal permeable side-hole microstructured fiber 20

Optical fiber temperature sensor based on liquid crystal per...

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20th International Conference on Optical Communications and Networks, ICOCN 2022

作者： Sun, Siming Lin, Weihao Shao, Liyang Liu, Shuaiqi Li, Shangru Ping.shum, Perry Southern University of Science and Technology School of Innovation and Entrepreneurship Shenzhen518055 China Southern University of Science and Technology Department of EEE Shenzhen518055 China University of Macau State Key Laboratory of Analog and Mixed-Signal VLSI 999078 China Peng Cheng Laboratory Shenzhen518005 China

ISBN: (数字)9781665458986

ISBN: (纸本)9781665458986

A Sagnac interferometer temperature sensor based on liquid crystal filled side hole fiber (SHF) is designed and studied. Liquid crystal's refractive index is sensitive to temperature changes. Therefore, the temperature sensitivity of the liquid crystal-filled sagnac interferometer is enhanced. Finally, temperature measurement and temperature sensing with sensitivity up to 223pm/°C can be achieved. This is about 20 times that of the Fiber Bragg Grating (FBG) sensor. © 2022 IEEE.

关键词： Liquid crystals

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analog and mixed-signal CMOS Circuits: The emergence and leadership of a Lab, a reference Book and the future at the core of the A/D Interface in the IoE

Analog and Mixed-Signal CMOS Circuits: The emergence and lea...

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European Conference on Solid-state Circuits (ESSCIRC)

作者： Rui P. Martins State-Key Laboratory of Analog and Mixed-Signal VLSI and IME/ECE-FST University of Macau Macau China Instituto Superior Técnico Universidade de Lisboa Lisboa Portugal

The analog/Digital Interface with Audio, Vision & Sensors, is essential for the Internet of Everything -IoE. The state key laboratory of analog and mixed-signal vlsi from University of Macau (UM), with a history of 30+ years, emerged as such in 2011, being now world-renowned for its excellence in the design of innovative circuits for the analog/digital interface. In a recent book entitled analog and mixed-signal Circuits in Nanoscale CMOS, we presented the most critical building blocks of such interface that need to exhibit high quality performance with low power consumption, high energy-efficiency and high speed. There is a huge pressure in the design area with a high demand for analog design engineers, opening a vast field of opportunities and challenges that imply a continuous knowledge update. UM is contributing to stimulate and well-equip the mind of future skillful analog design engineers in state-of-the-art designs adequate for most IoE applications.

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Simple-Logic Comparator-Offset Mitigation Technique for Resistor-Based Temperature Sensor in DFLL

Simple-Logic Comparator-Offset Mitigation Technique for Resi...

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IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA)

作者： Dan Shi Ka-Meng Lei Rui P. Martins Pui-In Mak State-Key Laboratory of Analog and Mixed-Signal VLSI and FST-ECE University of Macau Macau China On leave from Instituto Superior Técnico Universidade de Lisboa Portugal

We propose a simple-logic system-level comparator offset mitigation technique for the resistor-based temperature sensor implemented with a digital frequency-locked loop (DFLL). Knowing that the frequency error due to the comparator offset depends on the initial digital-controlled oscillator's frequency (f DCO ), we can preset the initial f DCO and obtain the average of the locked frequencies to eliminate the frequency and thus temperature error. The entire scheme entails only simple logics, minimizing the area overhead associated with the offset-calibration circuit. We verify the technique with a DFLL resistor-based temperature sensor designed in a 65-nm CMOS process. The simulated temperature error is <±0.4°C over a temperature range of -40 to 125°C in the presence of ±10mV comparator offset.

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A 79.5dB-SNDR Pipelined-SAR ADC with a Linearity-Shifting 32× Dynamic Amplifier and Mounted-Over-Die Bypass Capacitors

A 79.5dB-SNDR Pipelined-SAR ADC with a Linearity-Shifting 32...

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Symposium on vlsi Technology

作者： Minglei Zhang Yuefeng Cao Yan Zhu Chi-Hang Chan R. P. Martins State-Key Laboratory of Analog and Mixed-Signal VLSI IME University of Macau Macao China On leave from Instituto Superior Técnico/Universidade de Lisboa Lisbon Portugal

This paper presents a $32\times $ low-noise dynamic amplifier (DA) with a linearity-shifting technique, facilitating a 15b pipelined-SAR ADC with 80 dB $SNR_{\text{@}DC}$. The linearity-shifted DA decouples the fundamental conflict between the noise and linearity in conventional DAs, rending a THD below -60dB at $0.8\mathrm{~V}_{\mathrm{pp,diff}}$ output swing. Moreover, the reference voltages are stabilized by the cost-effective mounted-over-die bypass capacitors. The 60MS/s ADC achieves 95.8dB and $87.3\mathrm{~dB}$ SFDR with a DC and Nyquist input, respectively, and an input noise density of $10.2\mathrm{nV}/\sqrt{\mathrm{Hz}}$.

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Model Predictive Control with Fixed Switching Frequency for Thyristor-Controlled LC-Coupling Hybrid Active Power Filter

Model Predictive Control with Fixed Switching Frequency for ...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Wai-Kit Sou Rui P. Martins Chi-Seng Lam State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau China Institute of Microelectronics University of Macau Macau China Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Macau China On leave from Instituto Superior Técnico Universidade de Lisboa Lisbon Portugal

ISBN: (数字)9798350394085

ISBN: (纸本)9798350394092

The Thyristor-controlled LC-coupling hybrid active power filter (TCLC-HAPF) exhibits the characteristics of low DC-link voltage and a wide reactive power compensation range, making it a promising compensator for medium-voltage-level power systems power quality conditioning. Conventional finite-set model predictive control (FS-MPC) typically utilizes a single switching vector in each control period, resulting in a variable switching frequency and noticeable output ripple. This article addresses these concerns by presenting an enhanced MPC that incorporates a fixed switching frequency, thereby resolving these challenges. Preliminary simulation studies are provided to verify the feasibility and performance of the proposed method.

关键词： Industrial electronics Reactive power Switching frequency Power quality Switches Active filters Control systems

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Direct Demodulation of Differential Phase from Φ-OTDR using Self-Homodyne Phase Diversity Receiver

Direct Demodulation of Differential Phase from Φ-OTDR using...

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2021 Asia Communications and Photonics Conference, ACP 2021

作者： Liu, Shuaiqi Yu, Feihong Xu, Weijie Liu, Huanhuan Shum, Perry Vai, Mang I. Shao, Liyang Department of Electrical and Electronic Engineering Southern University of Science and Technology Shenzhen518000 China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau 999078 China

ISBN: (纸本)9781957171005

Differential Phase information of Φ-OTDR signal is directly extracted based on self-homodyning the Rayleigh backscattered light using a 90° optical hybrid receiver. The proposed method offers a cost-effective solution for quantitative distributed vibration sensing with low computation complexity. © Optica Publishing Group 2021

关键词： Demodulation

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A 9.97-GHz 190.6-dBc/Hz FOM CMOS VCO Featuring Nested Common-Mode Resonator and Intrinsic Differential 2nd-Harmonic Output

A 9.97-GHz 190.6-dBc/Hz FOM CMOS VCO Featuring Nested Common...

引用

IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Yunbo Huang Yong Chen Chaowei Yang Pui-In Mak Rui P. Martins State Key Laboratory of Analog and Mixed-Signal VLSI and IME/ECE-FST University of Macau Macao China On leave from Instituto Superior Técnico Universidade de Lisboa Portugal

This paper presents an 8-to-10GHz CMOS voltage-controlled oscillator (VCO) with common-mode (CM) resonance. It features a nested 8-shape inductor-based CM resonator with intrinsic differential $2^{\text{nd}}$ harmonic extraction. The mutual coupling of the main tank and CM resonator is negligible due to the reversal magnetic field, which avoids the additional chip area occupation of the explicit CM inductor. The VCO prototyped in 65-nm CMOS scores a −136.7-dBc/Hz PN with 10-MHz offset at 9.97 GHz, consuming 4 mW of power with a standard supply voltage of 1-V. The achieved peak Figure-of-Merit (FOM) is 190.6 dBc/Hz at 10-MHz offsets. Over a 22.9% tuning range, the VCO upholds a consistent FOM of >188.5 dBc at a 10-MHz offset. The core area is 0.116 mm 2 ,

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A Double-Side Self-Tuning IPT Converter Immune to Parameters Variation Under Misalignment Condition

A Double-Side Self-Tuning IPT Converter Immune to Parameters...

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Annual Conference of Industrial Electronics Society

作者： Bowei Zou Zhicong Huang Io-Wa Iam Lam Chi-Seng Shien-Ming Wu School of Intelligent Engineering South China University of Technology Guangzhou China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau China Institute of Microelectronics University of Macau Macau China Department of Electrical and Computer Engineering Faculty of Science and Technology University of Macau Macau China

ISBN: (数字)9781665464543

ISBN: (纸本)9781665464550

For inductive power transfer (IPT) systems, the loosely coupled transformer (LCT) is a crucial component. Variations in the air gap can lead to fluctuations in the parameters of the LCT, such as self-inductance and mutual inductance, caused by positional deviations of the ferrite cores on both sides. However, such variable LCT parameters can damage the resonant tank, thus impacting transmission efficiency and output stability. To address this issue, this paper proposes a self-tuning S/S IPT system based on switch-controlled capacitors (SCCs). The system utilizes gradient descent methods independently on double-side to achieve decoupled tuning control. This approach effectively mitigates the impact of LCT parameter fluctuations without requiring wireless communication. Furthermore, all switches in the system operate at fixed frequencies and implement soft switching. Finally, a prototype is constructed to validate the effectiveness of the proposed system.

关键词： Wireless communication Fluctuations Capacitors Air gaps Prototypes Switches Transformer cores Transformers Steady-state Tuning

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