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检索条件"任意字段=IEEE Biomedical Circuits and Systems Conference"

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Design and Analysis of Low-Noise Instrumentation Amplifier for biomedical Signal Acquisition systems 4

Design and Analysis of Low-Noise Instrumentation Amplifier f...

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4th International conference on Computer, Communication, Control and Information Technology, C3IT 2024

作者： Choudhary, Sunil Kumar Bera, Tushar Kanti Dept. of Electrical Engineering WB Durgapur713209 India Dr. B. C. Roy Engineering College Dept. of Electrical Engineering WB Durgapur713206 India WB Durgapur713209 India

ISBN: (纸本)9798350389128

biomedical signals are essentially required to be monitored in the diagnosis and treatment of many human illnesses and health problems. biomedical instrumentation, consisting of instrumentation amplifiers, various filters, digitizers, and data acquisition systems, is essential for building efficient physiological signal acquisition systems to sense, monitor, and acquire low-amplitude biomedical signals. This article describes a thorough simulation research work conducted to analyze the noise levels in several biomedical instrument amplifier circuits. The research aimed to develop an instrumentation amplifier (INA) with high gain and low noise while keeping the cost reasonable. Three distinct biopotential amplifier circuits have been designed and developed using NI-Multisim software, and a thorough examination of noise was conducted to determine the optimal biomedical measuring method. The simulation results demonstrate that the instrumentation amplifier, constructed using a combination of a voltage feedback instrumentation amplifier (VF-INA), exhibits the highest gain (98.22 dB), a high signal-to-noise ratio (SNR) of 70.93 dB, and a high common mode rejection ratio (CMRR) of 102 dB. These characteristics are achieved while maintaining a low noise level within the biomedical signal bandwidth of the voltage feedback amplifier. This study offers a comprehensive framework for developing biomedical signal acquisition system (BSAS) circuits that exhibit great amplification with lower noise interference. These circuits are specifically designed to capture the low-amplitude physiological signals for biomedical research. © 2024 ieee.

关键词： Feedback amplifiers

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Flexible Wearable Biopatches for Physiological Monitoring using Dry Thin Gold Film Electrodes

Flexible Wearable Biopatches for Physiological Monitoring us...

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2023 ieee biomedical circuits and systems conference, BioCAS 2023

作者： Sheeraz, Muhammad Failor, Carson Cable, Austin Khan, Nadeem Ahmad Drakakis, E.M. Saadeh, Wala Bin Altaf, Muhammad Awais Imperial College London United Kingdom WA United States Pakistan

ISBN: (纸本)9798350300260

In this work, flexible, Kapton film-based point-of-care biomedical patches are presented for the acquisition of critical physiological signals including electroencephalogram (EEG) and electrocardiogram (ECG), simultaneously. These physiological biomedical patches incorporate flexible, dry, gold-printed electrodes along with integrated electronics. Patches' vertical stack consists of a total of four flexible layers and is assembled in the best optimum manner to ensure a noise-mitigated and robust acquisition system. Flexible gold electrodes are encapsulated in the bottom layer and the associated electronic circuitry is on the top layer, resulting in active electrode topology. Active shielding and ground plane layers are stacked very next to the bottom and top layers, respectively for noise immunity and better performance. The 4 differential channel EEG and 1 differential channel ECG point-of-care biomedical patches were applied onto the forehead and chest, respectively, for high-quality, and long-term physiological signals acquisition in a non-invasive manner. The realized EEG and ECG flexible biomedical patches form firm adhesion with the skin for long-term 24/7, user-friendly, remote body vitals monitoring having mere dimensions of 160mm x 24mm and 70mm x 70mm, respectively. © 2023 ieee.

关键词： Active Electrodes (AEs) Analog Front End (AFE) and Flexible Point-of-Care biomedical Patches Electrocardiogram (ECG) Electroencephalogram (EEG)

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Photoluminescent Polymer Films for High-Sensitivity Oxygen Sensing in biomedical Implants 38

Photoluminescent Polymer Films for High-Sensitivity Oxygen S...

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38th ieee International conference on Micro Electro Mechanical systems, MEMS 2025

作者： Singer, Julian A. Geläschus, Anton Kleinschnittger, Patrick Schmidt, Ute Kuhl, Matthias Bahr, Andreas Hamburg University of Technology Institute for Integrated Circuits Germany Imtek University of Freiburg Laboratory for Microelectronics Germany Technische Universität Dresden Germany

ISBN: (纸本)9798331508890

This paper presents a comprehensive experimental study on photoluminescent oxygen indicators and a rapid prototyping approach to manufacture biocompatible polymer films for future implantable sensors. Combining single photon avalanche diodes (SPADs) in a complementary metal-oxide-semiconductor (CMOS) technology, post-CMOS micro light-emitting diodes (μLEDs), and a photoluminescent layer allows for precise integrated oxygen detectors. To optimize the phosphorescent component, this paper provides extensive data by comparing different indicators, light sources, concentrations, and manufacturing technologies, tailored to the application in patient-specific implants. © 2025 ieee.

关键词： CMOS integrated circuits

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Diffusion Model with Self-supervised Training for Subject-aware Photoplethysmography Recovery

Diffusion Model with Self-supervised Training for Subject-aw...

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2023 ieee biomedical circuits and systems conference, BioCAS 2023

作者： Wang, Daomiao Hu, Qihan Feng, Xujian Yang, Cuiwei Fudan University Center for Biomedical Engineering School of Information Science and Technology Shanghai China Key Laboratory of Medical Imaging Computing and Computer Assisted Intervention of Shanghai Shanghai China

ISBN: (纸本)9798350300260

Photoplethysmography (PPG) has emerged as a promising technology for wearable personal healthcare due to its non-invasive and cost-effective nature. However, owing to the vulnerability to various noise, the useful PPG signals are few and the usability of PPG-based systems are limited. In this paper, we address the challenge of recovering extremely corrupted PPG waveforms with severe distortions, which lead to missing data. Specifically, we propose a novel diffusion-based framework that incorporates remaining values and subject-aware embedding, along with a self-supervised generative training strategy. Extensive experiments were performed on two datasets under three missing rates and two missing patterns. Our proposed model achieves significant improvements of nearly 100% over existing imputation models on quantitative metrics, and together with the visualization, demonstrating its effectiveness for data distribution generation and corrupted PPG restoration. Our proposed method also provides a new perspective for PPG denoising. © 2023 ieee.

关键词： Deep generative model Diffusion model Motion artifact Photoplethysmography Self-supervised training

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Live Demonstration: A fully embedded adaptive real-time hand gesture classifier leveraging HD-sEMG and deep learning

Live Demonstration: A fully embedded adaptive real-time hand...

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2023 ieee biomedical circuits and systems conference, BioCAS 2023

作者： Isabel, Xavier Labbe, Thomas Chamberland, Felix Buteau, Etienne Campbell, Evan Cote-Allard, Ulysse Tam, Simon Fortier, Paul Campeau-Lecours, Alexandre Boukadoum, Mounir Scheme, Erik Gosselin, Benoit Laval University Electrical Engineering and Computer Engineering Department Canada University of New-Brunswick Institute of Biomedical Engineering Canada University of Oslo Department off Technology Systems Norway Laval University Mechanical Engineering Department Canada University of Quebec at Montreal Computer Science Department Canada

ISBN: (纸本)9798350300260

In a fully immersive virtual reality setting, visitors will actively participate in our demonstration, engaging in an interactive videogame utilizing our cutting-edge HD-sEMG Bracelet. Prior to this, they will undergo state-of-the-art training to personalize their machine learning gesture recognition model. The gameplay will be broadcast on a computer monitor, allowing onlookers to observe while the demonstrator explains the core concept of our work. By wearing the bracelet, the player gains control over their limb in a game inspired by Simon Says. Throughout the demonstration, visitors will gain firsthand experience and knowledge about the forthcoming advantages of HD-sEMG for control applications, such as prosthesis control. They will also discover how the EMaGer HD-sEMG Bracelet capitalizes on its uniform and high electrode density to enhance the reliability of hand gesture recognition models utilized in myoelectric prosthesis control. © 2023 ieee.

关键词： Armband Control Convolution Deep Learning Edge Computing Electromyography Gesture HD-EMG Machine Learning Myoelectric Neural Network

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Active Cancellation of Direct Feedthrough Enables 100-fold More Sensitive Mass-Limited Detection in Magnetic Particle Sensing systems

Active Cancellation of Direct Feedthrough Enables 100-fold M...

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2023 ieee biomedical circuits and systems conference, BioCAS 2023

作者： Huynh, Quincy Doyle, Owen Fung, K.L Barry Saayujya, Chinmoy Conolly, Steven University of California Berkeley Department of Electrical Engineering and Computer Sciences BerkeleyCA United States University of California Berkeley Department of Bioengineering BerkeleyCA United States

ISBN: (纸本)9798350300260

Magnetic particle imaging (MPI) is a tracer imaging modality that detects superparamagnetic iron oxide nanoparticles (SPIOs), enabling sensitive, radiation-free imaging of cells and disease pathologies. The arbitrary waveform relaxometer (AWR) is an indispensable platform for developing magnetic nanoparticle tracers and evaluating tracer performance for magnetic particle imaging applications. One of the biggest challenges in arbitrary waveform excitation is direct feedthrough interference, which is usually six orders of magnitude larger than the signal from magnetic nanoparticles. This work will showcase hardware that suppresses this interference by an order of magnitude, increasing the dynamic range of the instrument and enabling mass-limited detection at full scale range. © 2023 ieee.

关键词： active cancellation direct feedthrough interference magnetic particle imaging magnetic particle relaxometry magnetic particle spectroscopy

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A 93.6dB-SNDR 5kHz-BW Fully Dynamic Hybrid CT-DT Noise Shaping SAR ADC 44

A 93.6dB-SNDR 5kHz-BW Fully Dynamic Hybrid CT-DT Noise Shapi...

引用

Custom Integrated circuits conference (CICC)

作者： Meng, Lingxin Zhao, Menglian Tan, Zhichao Zhejiang Univ Hangzhou Peoples R China

ISBN: (纸本)9798350394061

The rapid progress of smart sensors and biomedical front-ends is summoning high-precision, high-energy-efficiency ADCs. To be embedded-friendly, properties like easily driven, adaptive bandwidth, and feasible clock generation cost are also favorable. In recent years, noise-shaping (NS) SARs have gained a great vogue for their fully dynamic operation and high energy efficiency [1]-[3]. Although impressive performances have been realized, the input capacitors of previous >90dB SNDR NS-SAR works are 2.4pF18pF to suppress kT/C noise at an OSR of 25125 [1]-[2]. This poses a stringent requirement for the input and reference drivers at a sampling rate of several MS/s. The kT/C cancellation technique has been adopted to deal with this issue, but it needs another amplifier and complexes the timing sequence [3]. Continuous-time (CT) SAR ADC, which keeps track of the input signal by a capacitive input network, obviates the input sampling operation and transfers the real sampling to the 2nd stage input [4]. The comparison between DT SAR and CT SAR is shown in Fig. 1. Since the kT/C noise can now be suppressed by the inter-stage gain, the system SNR is no longer restrained by the input capacitance in CT SAR, which provides a direction to implement easy-driven high-precision NS-SAR ADCs. © 2024 ieee.

关键词： Continuous time systems

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A Highly Integrated Low-Intensity Pulsed Ultrasound Generation System for biomedical Therapeutic Applications.

A Highly Integrated Low-Intensity Pulsed Ultrasound Generati...

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2023 ieee biomedical circuits and systems conference, BioCAS 2023

作者： Wang, Shuren Ye, Xuanjie Chen, Jie University of Alberta Department of Electrical and Computer Engineering Edmonton Canada

ISBN: (纸本)9798350300260

Low-intensity pulsed ultrasound (LIPUS) is gaining popularity in various medical therapeutic applications thanks to its non-invasiveness and versatility. However, commercial LIPUS devices are still cumbersome and expensive. In this paper, a highly integrated LIPUS generation system based on a buck-boost converter is proposed. The integrated system is designed with AMS 350nm technology, consists a current-starving clock generator, a buck-boost converter, a converter driver, and a half-bridge transducer driver. The die area of the chip is 3.06 mm2. It anticipates a compact, lightweight device, which is highly desirable in biomedical applications for patient comfort and convenience. Post-layout simulations illustrate that the system is effectively configured to drive an ultrasound transducer, producing frequencies within a range of 266.7kHz to 2.78MHz. It also achieves a broad output voltage range from 1V up to 42V, while the input range is from 1.8V to 5V. An optimized Pulse-Width Modulation (PWM) control system is proposed for the buck-boost converter to augment the stability of the system and facilitate a peak conversion efficiency of 73.3%. © 2023 ieee.

关键词： low-intensity ultrasound power conversion

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Silicon Photomultiplier-based Low-light in vivo Fiber Photometry

Silicon Photomultiplier-based Low-light in vivo Fiber Photom...

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2023 ieee biomedical circuits and systems conference, BioCAS 2023

作者： Namazi, Mahrokh Peringod, Govind Bisht, Anupam Bains, Jaideep Gordon, Grant R Murari, Kartikeya University of Calgary Dept. of Physiology and Pharmacology Calgary Canada University of Calgary Dept. of Biomedical Engineering Calgary Canada University of Calgary Dept. of Electrical and Software Engineering Calgary Canada University of Calgary Hotchkiss Brain Insititute Calgary Canada

ISBN: (纸本)9798350300260

Fiber photometry is an important tool for studying neural activity in freely moving animals. Existing systems utilize photodetectors requiring a high bias voltage or high optical power. The former results in expensive bulky systems and the latter leads to photobleaching or phototoxicity. We present a low-light fiber photometry system for recording neural activity in mice. Employing a sensitive silicon photomultiplier (SiPM) allows the use of low excitation light without requiring high-voltage power supplies. Isosbestic wavelength control was implemented to correct for motion artifacts. The same control signal was used as a novel method for SiPM gain correction, eliminating the need for additional sensors and control mechanisms. An off-the-shelf impedance measurement integrated circuit was used to simplify the electronics for homodyne detection of light. Sensitivity, dynamic range, and robustness to artifacts were characterized by measurement of fluorescence in fluorescein solutions. In vivo measurements during footshock experiments validated the system's effectiveness at 2.3 μW excitation power. The system's power requirements show promise for miniaturization and animal-mountable configurations. © 2023 ieee.

关键词： artifact reduction fiber photometry MPPC neural recording SiPM

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A Comparative Study on Wireless Power Transfer to Millimeter-Scale biomedical Implants with Ultrasound and Magnetoelectric Technologies

A Comparative Study on Wireless Power Transfer to Millimeter...

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2023 ieee biomedical circuits and systems conference, BioCAS 2023

作者： Hosur, Sujay Karan, Sumanta Kumar Priya, Shashank Kiani, Mehdi The Pennsylvania State University School of Electrical Engineering and Computer Science University ParkPA United States The Pennsylvania State University Department of Materials Science and Engineering University ParkPA United States

ISBN: (纸本)9798350300260

Wireless power transfer (WPT) to biomedical implants enables their miniaturization to millimeter (mm) scales by removing their battery, which is critical for chronic operation. Ultrasound (US) and magnetoelectric (ME) modalities are both emerging technologies for WPT to mm-sized implants at deep sites (several centimeters) as they enjoy higher regulatory safety limits. In US WPT, the piezoelectric transducer in the implant generates an electric voltage when actuated by US pressure. In ME WPT, the ME transducer composed of a layered magnetostrictive and piezoelectric structure is exposed to low-frequency magnetic field to generate an electric voltage. Since both US and ME transducers operate at acoustic wave resonance, high-performance mm-sized transducers operating at MHz and sub-MHz frequencies are viable. Although US and ME WPT modalities have been studied individually in the literature, there is no comparative study of them for similar conditions. This paper compares the power delivery capabilities of these two modalities using comparable mm-sized receiver transducers of 6.4×2.3×1 mm3. In measurements at 30 mm depth, considering the safety limits, the ME and US WPT links could deliver 4.4 mW and 6.25 mW of power in a tissue and water medium, respectively. © 2023 ieee.

关键词： biomedical implants magnetoelectric transducers ultrasound transducers Wireless power transfer

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