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Preliminary Research on Super-Regenerative Receiver for Intracardiac Communication

Preliminary Research on Super-Regenerative Receiver for Intr...

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Cross Strait Quad-Regional Radio science and Wireless technology Conference (CSRWTC)

作者： Xueyu Weng Dongming Li Wenxiang Zhao Sio Hang Pun Mang I. Vai Yueming Gao College of Advanced Manufacturing Fuzhou University China The International Joint Laboratory on Health Intelligent Monitoring Systems Fuzhou University China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau China Faculty of Science and Technology University of Macau China College of Physics and Information Engineering Fuzhou University China

Existing commercial pacemakers only provide single-chamber pacing and cannot achieve multi-chamber sequential pacing. Conduction Intracardiac Communication(CIC) has the characteristics of low power consumption and high security, which is very suitable for communication between multi-chamber leadless pacemakers. Because the pacemaker needs to be implanted into the heart, which limits its volume, power consumption, and other related parameters, and the super-regenerative circuit has its low power consumption and simple circuit structure, the super-regenerative receiver scheme is a good choice for intracardial communication where power consumption is the main problem. In this paper, a prototype super-regenerative receiver suitable for intracardiac communication is proposed. The differential instrument amplifier with high input impedance is used to filter out the external electromagnetic interference, reduce the input equivalent noise, and improve the signal-to-noise ratio. A super-regenerative oscillator and a filter amplifier circuit are designed to enhance the effectiveness and reliability of the communication. The experimental results show that the bit error rate of the circuit is lower than $\boldsymbolsignal \times \boldsymbol{10^{-5}}$ for the received signal of -92 dBm.

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Fast Phase Demodulation Method for Heterodyne Phase-Sensitive OTDR

Fast Phase Demodulation Method for Heterodyne Phase-Sensitiv...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Shuaiqi Liu Feihong Yu Liyang Shao Mang I Vai Department of Electronic and Electrical Engineering Southern University of Science and Technology Shenzhen China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau S.A.R. China

We propose a fast and effective phase demodulation method based on the spatial phase shifting technique for heterodyne phase-sensitive OTDR. An orthogonal signal can be directly obtained using the spatially shifted original signal, without the need for digital I/Q demodulation or Hilbert transform. The proposed method has experimentally demonstrated at least 30% phase demodulation speed improvement with no deterioration in the demodulation results compared to the conventional methods. This technique may prove useful for practical distributed acoustic sensing applications, because of its simpler computation process and faster computation speed.

关键词： Optical fibers Optical mixing Transforms Reflectometry Acoustics Real-time systems Optical reflection

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A Time-Domain CMOS Temperature Sensor Using Gated Ring Oscillator with Linearity Optimization 15

A Time-Domain CMOS Temperature Sensor Using Gated Ring Oscil...

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15th International Symposium on signals, Circuits and Systems, ISSCS 2021

作者： Liu, Yangyang Lei, Yu Law, Man-Kay Veigas, Bruno Mak, Pui-In Martins, Rui P. IME and FST-ECE University of Macau State Key Laboratory of Analog and Mixed-Signal VLSI Macao China Universidade NOVA de Lisboa Faculty of Science and Technology i3N CENIMAT Department of Materials Science Portugal Instituto Superior Tecnico Universidade de Lisboa Portugal

ISBN: (纸本)9781665449427

This paper presents a time-domain CMOS temperature sensor with linearity optimization. We employ a bipolar junction transistor (BJT)-based frontend together with an on-chip temperature-compensated gated ring oscillator (GRO) with intrinsic first-order noise shaping to achieve both high linearity and accuracy. This work also systemically optimizes the nonlinearity introduced by: 1) the curvature of VBE;2) the voltageto-Time conversion;and 3) the quantization error. Implemented in a standard 0.1\mathrm{S}-\mu \mathrm{m} CMOS process, this work demonstrates an inaccuracy of \pm 0.35{\circ}\mathrm{C} and a conversion time of 0.165ms over a wide temperature range from-40 to 125{\circ}\mathrm{C}, featuring a favorable accuracy-and resolution-FOM of 0.64nJ% 2 and 17.4\mathrm{p}\mathrm{J}{\circ}\mathrm{C}{2}, respectively. © 2021 IEEE.

关键词： Temperature sensors

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A Blocker-Tolerant Mixer-First Receiver with Channel BW Extention Technique Achieving 22.2 dBm OOB-IIP3 and 23.3 MHz BW

A Blocker-Tolerant Mixer-First Receiver with Channel BW Exte...

引用

International Conference on Integrated Circuits and Microsystems (ICICM)

作者： Yongjun He Gengzhen Qi Pui-In Mak School of Microelectronics Science and Technology Sun Yat-sen University Zhuhai China State-Key Lab of Analog and Mixed-Signal VLSI / IME University of Macau Macao China

ISBN: (纸本)9781665460583

In this work, a 0.5-to-2 GHz blocker-tolerant mixer-first receiver (RX) is proposed, which features a pair of complex poles to extend the Bandwidth (BW) and enhance the linearity, a fully-differential low-noise transconductance-amplifier (LNTA) to improve noise Figure (NF), and a transmission-gate (TG) mixer to reduce the local oscillator (LO) leakage. By using an attenuator as the bypass feedback of capacitor, a pair of complex poles is introduced at baseband (BB) as low-pass response and frequency-translated to RF as bandpass response, achieving −40dB/dec roll-off slope. When implemented in 65 nm CMOS technology, the simulation results show that at 80 MHz offset the RX achieves 22.2 dBm OOB-IIP3, 23.3 MHz channel BW and −81 dBm LO leakage. Covering from 0.5 to 2 GHz, the NF ranges 4.1 to 6.2 dB while the RX consumes a reasonable power of 57 to 75 mW. The active area is $0.96 mm^{2}$.

关键词： Resistors Radio frequency Micromechanical devices Noise figure Power demand Simulation Linearity

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A 32dBm OOB-IIP3 BW-Extended 5G-NR Receiver with 4th-Order Gain-Boosted N-Path LNA

A 32dBm OOB-IIP3 BW-Extended 5G-NR Receiver with 4th-Order G...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Zhixiang Liu Shiyou Wei Gengzhen Qi Pui-In Mak School of Microelectronics Science and Technology Sun Yat-sen University Zhuhai China State-Key Lab of Analog and Mixed-Signal VLSI/IME University of Macau Macao China

This paper reports a self-interference-resilient receiver (RX) for 5G-NR-FDD covering 0.5 to 2GHz. It incorporates a $4^{\text{th}}$ -order gain-boosted N-path low-noise amplifier (LNA) and a $2^{\text{nd}}$ -order baseband (BB) TIA to widen the −3dB RF-BW and also enhance the out-of-band (OOB) roll-off slope. Furthermore, a positive-feedback loop is created for the input-impedance matching purpose thanks to the impedance-translation property of the N-path network. Implemented in 65nm CMOS process, the simulation results show that with >54MHz RF-BW the RX achieves >24dB OOB rejection at 80MHz offset. When the offset frequency $(\Delta f)$ is twice the −3dB RF-BW, the RX achieves 32dBm OOB-IIP 3 , while consuming a reasonable power of 27 to 67mW. The noise figure (NF) ranges from 3.2 to 5.5dB and active area is $0.38\text{mm}^{2}$ .

关键词： Radio frequency Noise figure Low-noise amplifiers Power demand Circuits and systems Simulation Impedance matching

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A 0.5 to 2GHz Blocker-Tolerant Receiver Achieving 29dBm OOB-IIP3 and 3.2 to 6dB NF Using Bottom-Plate Switched-Capacitor Technique

A 0.5 to 2GHz Blocker-Tolerant Receiver Achieving 29dBm OOB-...

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IEEE Asia-Pacific Conference on Circuits and Systems

作者： Yi Mao Yuyang Du Yongjun He Gengzhen Qi Pui-In Mak School of Microelectronics Science and Technology Sun Yat-sen University Zhuhai China State-Key Lab of Analog and Mixed-Signal VLSI/IME University of Macau Macao China

In this paper, a blocker-tolerant receiver (RX) is proposed covering 0.5 to 2GHz, which incorporates a gain-boosted (GB) mixer-first low-noise amplifier (LNA) network and a bottom-plate switched-capacitor (SC) N-path filter to enhance the out-of-band (OOB) blocker suppression and also improve the noise figure (NF). Furthermore, a clock-delay technique is proposed to improve the LO non-overlap characteristics. Implemented in 65nm CMOS technology, the simulated results present that under 80MHz offset frequency the RX achieves 29dBm OOB-IIP 3 and −2.3dBm B −1dB. The noise figure (NF) is simulated ranging from 3.2 to 6dB, and the active area is 0.66mm 2 . At 2GHz, the power consumption is 25mW, in which only 4.7mW is due to the LO dynamic power.

关键词： Radio frequency Noise figure Low-noise amplifiers Power demand Linearity Switches Receivers

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A Low-Power Blocker-Tolerant Receiver with Wideband Negative-Feedback Technique Achieving 22.4dBm OOB-IIP3

A Low-Power Blocker-Tolerant Receiver with Wideband Negative...

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International Conference on Integrated Circuits and Microsystems (ICICM)

作者： Chenxiang Cai Gengzhen Qi Pui-In Mak School of Microelectronics Science and Technology Sun Yat-sen University Zhuhai China State-Key Lab of Analog and Mixed-Signal VLSI/IME University of Macau Macao China

ISBN: (纸本)9781665460583

This paper proposes a low-power four-phase wideband negative-feedback (WNF) receiver which is tunable to operate at 0.1 to 2GHz. A gain-boosted N-path low-noise amplifier (LNA) is employed to achieve both low noise Figure (NF) and high linearity. Besides, an extra up-conversion path is introduced from baseband (BB) output to radio frequency (RF) input to create a negative-feedback loop that optimizes the input-impedance matching. The Miller theory has been extended to passive-mixer switches to realize a smaller input parasitic capacitance. Implemented in 65nm CMOS process, the simulation results show that the receiver achieves 22.4dBm OOB-IIP3 at 80MHz offset frequency and 16.4MHz channel BW at 2GHz. When covering 0.1 to 2GHz, the NF ranges from 2.S to 5dB and gain varies from 31.8 to 35.7dB, while only paying 7 to 31mW power consumption.

关键词： Band-pass filters Resistors Radio frequency Noise figure Baseband Linearity Receivers

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A Novel Multiple Modes Resonant Sensor Featuring Blue Sideband Excitation

A Novel Multiple Modes Resonant Sensor Featuring Blue Sideba...

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IEEE International Conference on Micro Electro Mechanical Systems

作者： Jiao Xu Zhuoyue Zheng Jingqian Xi Ziqian Zhang Huafeng Liu Pan Zhang Jianlin Chen Chen Wang Michael Kraft Yuan Wang R. P. Martins Pui-In Mak MOE Key Laboratory of Fundamental Physical Quantities Measurement PGMF and School of Physics Huazhong University of Science and Technology Wuhan P. R. China Institute of Microelectronics State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau China National Key Laboratory of Advanced Micro and Nano Manufacture Technology School of Integrated Circuits Peking University China School of Microelectronics Shanghai University China Department of Electrical Engineering-MNS KU Leuven Leuven Belgium

ISBN: (数字)9798331508890

ISBN: (纸本)9798331508906

This paper reports a novel MEMS resonant structure functioning as a baseline resonant electrostatic force/temperature sensor, highlighting its substantial potential in sensing applications. The resonator, characterized by a dual-cosine structure, is capable of simultaneous multiple resonant modes actuation within the 300 kHz range, through a sole-source drive approach using the recent emerging Blue Sideband Excitation (BSE) technique. This method enables a distinctive multi-modal response, essential for multi-parameter measurements. The research focuses on the sensor’s temperature characteristics, electrostatic perturbation sensitivity, and noise floor. Notably, the study reveals intriguing temperature responses across different modes, where certain modes exhibit a significant frequency rise with increasing temperature, this is counter-intuitive with common MEMS resonator devices, prompting further investigation into the underlying mechanisms. The analysis of electrostatic perturbation sensitivity and noise background further unfolds the resonator’s performance under various excitation conditions, laying a foundation for advancing sensor functionality, and providing solid evidence on the viability of the subject. To sum up, this study highlights the resonator’s potential as a high-precision sensor, opening new opportunities for MEMS sensor design and multi-parameter measurement applications.

关键词： Temperature measurement Micromechanical devices Temperature sensors Electric potential Temperature Sensitivity Perturbation methods Noise Sensors Electrostatics

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Direct Demodulation of Differential Phase from $\Phi$-OTDR using Self-Homodyne Phase Diversity Receiver

Direct Demodulation of Differential Phase from $\Phi$-OTDR u...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Shuaiqi Liu Feihong Yu Weijie Xu Huanhuan Liu Perry Shum Mang I Vai Liyang Shao Southern University of Science and Technology Shenzhen China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau China

Differential Phase information of $\Phi$ -OTDR signal is directly extracted based on self-homodyning the Rayleigh backscattered light using a $90^{\circ}$ optical hybrid receiver. The proposed method offers a cost... 详细信息

ISBN: (纸本)9781665410953

关键词： Vibrations Bandwidth Vibration measurement Optical receivers Optical sensors Data mining Computational complexity

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An ERP Study on the Influence of Lyric to Song's Emotional state

An ERP Study on the Influence of Lyric to Song's Emotional S...

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International IEEE/EMBS Conference on Neural Engineering, CNE

作者： Cheng Li Jia Wen Li Sio Hang Pun Fei Chen Southern University of Science and Technology Shenzhen China State Key Laboratory of Analog and Mixed-Signal VLSI University of Macau Macau China

Songs can express emotions and contain both lyrics and music. Early behavioral studies have shown that songs are influenced by the presence of lyrics for emotional processing. This work further examined the event-related potential (ERP) N400 responses of participants to elucidate whether lyrical and non-lyrical songs have different influences to different emotional states (happiness and sadness in this work). The song stimuli were processed and subjectively annotated with four conditions (i.e., lyrical and non-lyrical songs, and happy and sad emotional states), and the processed stimuli were presented to normal-hearing listeners in ERP experiments according to an affective priming paradigm. The song stimuli served as the prime stimuli and the affective-semantic words as the target stimuli. The experimental results showed that the non-lyrical songs evoked a larger amplitude than lyrical songs for happy emotion, and the lyrical songs evoked a larger amplitude than the non-lyrical songs for sad emotion. Results in this work suggest that the presence of the lyrics has a differential effect in happy and sad songs, and provide evidence that music and lyrics separately influence the diverse emotional processing.

关键词： Brain Neural engineering Music Functional magnetic resonance imaging Acoustic measurements

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