A5023015891- Non-Invasive Vital Sign Monitoring
- ECG Monitoring and Analysis
- Advanced Sensor and Energy Harvesting Materials
- Neuroscience and Neural Engineering
- EEG and Brain-Computer Interfaces
- 3D IC and TSV technologies
- Analog and Mixed-Signal Circuit Design
- Muscle activation and electromyography studies
- Advanced DC-DC Converters
- Tactile and Sensory Interactions
- Sensor Technology and Measurement Systems
- Radio Frequency Integrated Circuit Design
- Electromagnetic Compatibility and Noise Suppression
- VLSI and FPGA Design Techniques
- Heart Rate Variability and Autonomic Control
- Gaze Tracking and Assistive Technology
- Manufacturing Process and Optimization
- Hemodynamic Monitoring and Therapy
- Electrical and Bioimpedance Tomography
Samsung (South Korea)
2022-2024
Ulsan National Institute of Science and Technology
2017-2022
Conventional brain activity monitoring devices including head bands and scalp caps are still not appropriate for daily-life applications because of their wearing discomfort electrode-related artifacts. A proposed behind-the-ear (BTE) device, where motion artifacts significantly reduced, would be a promising candidate continuous mental healthcare platforms. This BTE-based measurement allows multimodal bio-signals such as electroencephalogram (EEG), electrocardiogram (ECG), photoplethysmogram...
This paper presents a flexible multi-functional physiological sensing system that provides multiple noise-immune readout architectures and hybrid-sensing capability with an analog pre-processing scheme. The proposed is designed to support five detection methodologies of piezo-resistive, pyro-resistive, electro-metric, opto-metric their hybrid, utilizing in-house e-skin device, electrodes LED-photodiode pair. For functional verification, eight representative capabilities were demonstrated...
This paper presents a wearable multi-biosignal wireless interface for sleep analysis. It enables comfortable monitoring with direct sleep-stage classification capability while conventional analytic interfaces including the Polysomnography (PSG) require complex post-processing analyses based on heavy raw data, need expert supervision measurements, or do not provide fit long-time wearing. The proposed consists of electroencephalography (EEG), electromyography (EMG), and electrooculography...
An impedance plethysmogram (IPG) IC with wide-range fine baseline tracking capability is proposed to provide continuous blood pressure (BP) and cardiovascular monitoring just by wearing a neckband wearable device. For the tracking, mixed-mode cancellation (MM-BC) scheme achieve wide dynamic range (DR) high SNR performance, where an artifact-detecting continuous-time (CT)- <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math...
This paper presents a wearable wireless surface electromyogram (sEMG) integrated interface that utilizes proposed analog pseudo-wavelet preprocessor (APWP) for signal acquisition and pattern recognition. The APWP is into readout circuit (ROIC), which fabricated in 0.18-μm complementary metal-oxide-semiconductor (CMOS) process. Based on this ROIC, device module its system prototype are implemented to recognize five kinds of real-time handgesture motions, where the power consumption further...
Recent wearable blood pressure (BP) measurements that are based on the pulse transit time (PTT) require additional bothersome contact for their subordinate electrocardiogram (ECG), such as from opposite hand's finger. This extra disrupts continuous BP monitoring during daily activities. A proposed neckband-based device allows measurement just by wearing it, and a baseline-tracking impedance plethysmogram (IPG) facilitates daily-life PTT at carotid artery [1]. For this purpose, mixed-mode...
This study presents a wearable neckband device for continuous cuffless blood pressure (BP) monitoring, where reliable neck-based BP measurement is achieved by utilizing the electrocardiogram (ECG) and impedance plethysmogram (IPG). Optimal composition position of sensing electrodes around neck were decided with consideration physiological characteristics human body, core parameter IPG magnitude was experimentally selected to improve estimation accuracy. For its small-featured noises-tolerant...
This paper presents a wearable electrophysiological interface with enhanced immunity to motion artifacts. Anti-artifact schemes, including patch-type modular structure and real-time automatic level adjustment, are proposed verified in two wireless system prototypes of electrocardiogram (ECG) module an electromyogram (EMG)-based robot-hand controller. Their common ExG readout integrated circuit (ROIC), which is reconfigurable for multiple physiological interfaces, designed fabricated 0.18 μm...
This brief presents a dual-rate dual-mode power digital-to-analog converter (DAC) circuit to cover wide range of supply voltages. For various applications, it is designed have dual conversion rate Nyquist and oversampling in conventional current-steering DACs, its output stage implemented support two kind modes high-voltage low-voltage. To achieve optimal performance spurious-free dynamic range, the swing adaptively maximized depending on voltage levels. feasibility proposed supply-scalable...
This paper proposes a split power-driving scheme for electromagnetic interference robust design and its automatic stepwise digital slope control suppression of spectral emission. analog-digital hybrid method gives power saving effect up to 24.4%, also production reliability can be improved by utilizing failure detection recovery scheme. For feasibility the proposed compatibility (EMC) scheme, Local Interconnect Network transceiver prototype is fabricated in 0.18-μm BCD process,...