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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Yu Lei Qishen Fang Jiangchao Wu Man-Kay Law Pui-In Mak Rui P. Martins State Key Laboratory of Analog and Mixed-Signal VLSI IME and FST-ECE University of Macau Macao China On leave from Instituto Superior Técnico Universidade de Lisboa Portugal

CMOS temperature sensors are widely employed in many control systems and sensing applications, including radio frequency identification (RFID) tags devices [1], systems-on-chips (SoCs) thermal management [2], as well as Internet of Things (IoT) [3] and wireless sensing devices [4]. To enable a high system level performance, such CMOS temperature sensors typically should be highly energy efficient while accomplishing a high temperature sensing accuracy.

关键词： Temperature sensors Wireless communication Temperature distribution Wireless sensor networks Systematics Linearity Thermal management

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A 0.01-mm² 1.2-pJ/bit 6.4-to-8Gb/s Reference-less FD-Less BBCDR Using a Deliberately-Clock-Selected Strobe Point Based on a 2π/3-Interval Phase

A 0.01-mm<SUP>2</SUP> 1.2-pJ/bit 6.4-to-8Gb/s Reference-less...

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IEEE MTT-S International Microwave Symposium (IMS)

作者： Zhao, Xiaoteng Chen, Yong Zheng, Xuqiang Mak, Pui-In Martins, Rui P. Univ Macau State Key Lab Analog & Mixed Signal VLSI Taipa Macao Peoples R China Univ Macau IME FST ECE Taipa Macao Peoples R China Chinese Acad Sci Inst Microelect Beijing Peoples R China

ISBN: (纸本)9781665403078

This paper reports a single-loop full-rate bang-bang clock and data recovery (BBCDR) without both external reference and separate frequency detector. Specifically, our bang-bang phase detector incorporates the intrinsic three phases with a 2 pi/3 interval of the three-stage ring oscillator to deliberate the clock-selected strobe-point scheme, resulting in substantial hardware relaxation for automatic frequency acquisition. Together with the aid of a hybrid control circuit, the BBCDR can capture 6.4-to-8Gb/s data-rate variation automatically. Designed in a 65nm CMOS technology, our BBCDR achieves an energy efficiency of 1.2pJ/bit and 0.58UI(PP) jitter tolerance at 200MHz jitter frequency, while occupying a tiny area of similar to 0.01 mm(2)

关键词： CMOS ring oscillator (RO) bang-bang clock and data recovery (BBCDR) frequency detector (FD) strobe point (SP) reference (REF) frequency acquisition clock selection

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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

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.

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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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

关键词： Electric power utilization

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A Power-Harvesting CGM Chiplet Featuring Silicon-Based Enzymatic Glucose Sensor 44

A Power-Harvesting CGM Chiplet Featuring Silicon-Based Enzym...

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44th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society (EMBC)

作者： Wang, Ting-Hsun Li, Zhuhao Liang, Bo Cai, Yu Wang, Zhiyu Yang, Changgui Luo, Yuxuan Sun, Jiabao Ye, Xuesong Chen, Yong Zhao, Bo Zhejiang Univ Inst VLSI Design Hangzhou 310027 Peoples R China Zhejiang Univ Dept Biomed Engn & Instrument Sci Hangzhou 310027 Peoples R China Zhejiang Univ Micronano Fabricat Ctr Hangzhou 310027 Peoples R China Univ Macau State Key Lab Analog & Mixed Signal VLSI Taipa Macao Peoples R China Univ Macau IME ECE FST Taipa Macao Peoples R China

ISBN: (数字)9781728127828

ISBN: (纸本)9781728127828

Diabetes has become a leading cause of death and disability in the past decades. Continuous glucose monitoring (CGM) is a prevailing technique to determine the glucose level and provide in-time treatment. However, conventional CGM systems combine an electrochemical sensor with a CMOS chip, suffering from bulky size and interface issues. Integrating the CGM sensor on silicon is potential to miniaturize the CGM system and reduce the cost, while the recent silicon-based sensors show limited detection range and sensitivity. In this work, we present a silicon-based CGM chiplet with wireless power transfer (WPT) and real-time wireless telemetry. Fabricated on a single silicon substrate, the chiplet consists of a silicon-based CGM sensor, a power-harvesting wireless-telemetry chip, and a silicon-based antenna. Measured results show that the chiplet achieves a sensitivity of 4 mu ***(-2) and a linear detection range of 0-10 mM. Based on WPT and backscattering communication, the chiplet consumes 18.8 m W power in glucose telemetry.

关键词： Glucose sensors Antenna measurements Semiconductor device measurement Sensitivity Silicon Glucose Telemetry

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A 6.78-MHz Single-Stage Wireless Power Receiver With Ultrafast Transient Response Using Hysteretic Control and Multilevel Current-Wave Modulation

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IEEE TRANSACTIONS ON POWER ELECTRONICS 2021年第9期36卷 9918-9926页

作者： Lin, Jie Zhan, Chenchang Lu, Yan Southern Univ Sci & Technol Sch Microelect Shenzhen 518055 Peoples R China Univ Macau Inst Microelect State Key Lab Analog Mixed Signal VLSI Macau 999078 Peoples R China Univ Macau FST DECE Macau 999078 Peoples R China Minist Educ Engn Res Ctr Integrated Circuits Next Generat Com Shenzhen 518055 Peoples R China

This article presents a 6.78-MHz single-stage regulating rectifier with hysteretic control and current-wave modulation (CWM) techniques for wireless power receiver applications. The proposed receiver realizes ac-dc rectification and dc-dc regulation in a single-power stage, thus improving the power efficiency and reducing the system volume. The hysteretic control together with the proposed CWM technique achieves a much accelerated load-transient response for the rectifier compared to the recently developed multicycle pulsewidth modulation techniques. The system design complexity is significantly reduced. The proposed multilevel CWM technique achieves more evenly distributed power conversions and less output voltage ripples. The proposed receiver fabricated in a 0.18-mu m CMOS process using 3.3-V devices can regulate the output voltage to 3.3 V and deliver 1.98-W maximum power with a measured peak efficiency of 92.14%. An instant load-transient response is observed for a load current step between 12 and 600 mA.

关键词： Rectifiers Voltage control Receivers Modulation Pulse width modulation Wireless communication Control systems Current-wave modulation (CWM) hysteretic control load-transient response power conversion efficiency (PCE) resonant regulating rectifier single-stage voltage regulation wireless power transfer (WPT)

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Adaptive Maximum Power Point Tracking With Model-Based Negative Feedback Control and Improved V-f Model

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 2021年第9期68卷 3103-3107页

作者： Wang, Yuanfei Huang, Mo Luo, Ping Lu, Yan Martins, Rui P. Univ Elect Sci & Technol China State Key Lab Elect Thin Films & Integrated Devic Chengdu 610053 Peoples R China Microelect Res Ctr Zhuhai UM Sci & Technol Res Inst Zhuhai 519031 Peoples R China Univ Macau State Key Lab Analog & Mixed Signal VLSI Inst Microelect Macau Peoples R China Univ Macau DECE FST Macau Peoples R China

This brief presents the model-based negative-feedback-control (NFC) for maximum power point tracking (MPPT), with an improved V-f model including the switch turn-on resistance in the switched-capacitor (SC) converter. The method is more efficient than the conventional simulation-based method to obtain the target V-T-f(T) curve of the solar energy harvesting system (EHS). Meanwhile, this brief compares two different MPPT schemes: maximum input PPT (MIPPT) and maximum output PPT (MOPPT). We find that MOPPT is more suitable for maximizing the utilization of solar energy. This design, implemented in 0.18 mu m CMOS and measured with a 4x4 cm(2) solar cell, exhibits an improved V-f model with an average tracking error of 0.47% for the MOPPT. MOPPT transfers more power to the load circuits than MIPPT and achieves a peak efficiency of 90.3% at 3k lux.

关键词： Model-based method energy harvesting system (EHS) NFC-based MPPT maximum input power point tracking (MIPPT) maximum output power point tracking (MOPPT)

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A 0.01mm², 0.4V-VDD, 4.5nW-Power DC-Coupled Digital Acquisition Front-End Based on Time-Multiplexed Digital Differential Amplification 48

A 0.01mm<SUP>2</SUP>, 0.4V-VDD, 4.5nW-Power DC-Coupled Digit...

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48th IEEE European Solid state Circuits Conference (ESSCIRC)

作者： Crovetti, Paolo Rubino, Roberto Toledo, Pedro Musolino, Francesco Klimach, Hamilton Chen, Yong Richelli, Anna Politecn Torino Dept Elect & Telecommun Turin Italy Univ Fed Rio Grande do Sul Elect Eng Dept Grad Program Microelect Porto Alegre RS Brazil Univ Macau State Key Lab Analog & Mixed Signal VLSI Macau Peoples R China Univ Macau IME ECE FST Macau Peoples R China Univ Brescia Dept Informat Engn Brescia Italy

ISBN: (数字)9781665484947

ISBN: (纸本)9781665484947

A reconfigurable, high-impedance, DC-coupled low-frequency digital acquisition front-end (DAFE) suitable to operate under a power supply voltage ranging from 0.2 to 1V down to 600 pW power is presented in this paper. Matching-indifferent DC accuracy over a rail-to-rail input range is uniquely achieved by the new time-multiplexed digital differential amplification technique at ultra-low area and without chopping and auto-zeroing. A 180 nm testchip of the proposed DAFE occupies 0.00945 mm(2) and draws 4.5 nW at a 0.4 V supply, has a 120 Hz gain-bandwidth product, with an in-band input noise of 11.3 mu V-rms, a 137 mu V input offset voltage standard deviation, 65.7 dB CMRR, 63.8 dB PSRR, and provides a 46.5 dB-SFDR, 6.9 bit-ENOB digitized output at -12 dBFS.

关键词： DC-coupled digital acquisition front-end (DAFE) time-multiplexed digital differential amplification (TMD(2)A) CMOS ECG IoT

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A 2.63 μW ECG Processor With Adaptive Arrhythmia Detection and Data Compression for Implantable Cardiac Monitoring Device

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IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 2021年第4期15卷 777-790页

作者： Yin, Yue Abubakar, Syed Muhammad Tan, Songyao Shi, Jiahua Yang, Peilin Yang, Wendi Jiang, Hanjun Wang, Zhihua Jia, Wen Seng-Pan, U. Tsinghua Univ Tsinghua Beijing Innovat Ctr Future Chips Sch Integrated Circuits Beijing 100084 Peoples R China Tsinghua Univ Shenzhen Res Inst Guangdong Engn Res Ctr ICs Wireless Healthcare Shenzhen 518057 Guangdong Peoples R China Univ Macau State Key Lab Analog & Mixed Signal VLSI IME ECE FST Macau 999078 Peoples R China

An ultra-low power ECG processor ASIC (application specific integrated circuit) with R-wave detection and data compression is presented, which is designed for the long-term implantable cardiac monitoring (ICM) device for arrhythmia diagnosis. An adaptive derivative-based detection algorithm with low computation overhead for potential arrhythmia recording is proposed to detect arrhythmia with the occasional abnormal heart beats. In order to save as much as possible cardiac information with the limited memory size available in the ICM device, a hierarchical data buffer structure is proposed which saves 3 types of data, including the raw ECG data segments of 2 seconds, compressed ECG data segments of 45 seconds, and R-peak values and interval lengths of >2000 beat cycles. A modified swinging-door-trending (SDT) method is proposed for the ECG data compression. The ASIC has been implemented based on fully-customized near-threshold standard cells using the thick-gate transistors in 65-nm CMOS technology for low dynamic power consumption and leakage. The ASIC core occupies a die area of 1.77 mm(2). The measured total power is 2.63 mu W, which is among the ECG processors with the lowest core power consumption. It exhibits a relatively high positive precision rate (P+) of 99.3% with a sensitivity of 98.2%, in contrast to the similar designs in literature with the same core power consumption level. Also, an ECG data compression ratio (CR) of up to 17.0 has been achieved, with a good trade-off between the compression efficiency and loss.

关键词： Electrocardiography Monitoring Data compression Hardware Medical services EPROM Power demand ECG processor implantable cardiac monitoring adaptive arrhythmia detection data compression swinging door trending

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A 33-37GHz Two-Path Power Amplifier with>18-dB Gain and 26.7-dBm Psat in 150nm GaAs Process

A 33-37GHz Two-Path Power Amplifier with>18-dB Gain and 26.7...

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Asia Pacific Conference on Postgraduate Research in Microelectronics & Electronics (PrimeAsia)

作者： Zhonghao Sun Zhili Liu Tianxiang Wu Hao Yu Yong Chen Shunli Ma State Key Laboratory of ASIC and System School of Microelectronics Fudan University Shanghai China School of Microelectronics Southern University of Science and Technology Shenzhen China State-Key Laboratory of Analog and Mixed-Signal VLSI and IME/ECE-FST University of Macau Macao China

This paper presents a GaAs power amplifier (PA). Through the theoretical analysis of the small-signal modeling and large-signal analysis of GaAs transistors, the main influencing factors affecting the saturated output power and gain of a single Gaas transistor are achieved. We develop a low-loss broadband matching by using T-type matching network technology. In addition, the input matching network and the output matching network are used to realize power distribution, which solves the problems of large area and high insertion loss of the traditional power divider in GaasPA. The designed PA is based on a 0.15um GaAs process. The simulation results show that our GaasPA can achieve a saturated output power of 26.7 dBm and a gain of 18 dB in the range of 33-to-37GHz, the DC power consumption is 214 mA at a supply of 5 V, and the chip area is $1.0 \ \mathbf{mm} \ \times \ 1.45 \ \mathbf{mm}$ ,

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