- Energy Harvesting in Wireless Networks
- Wireless Power Transfer Systems
- RFID technology advancements
- Semiconductor materials and devices
- Advanced Memory and Neural Computing
- Advancements in Semiconductor Devices and Circuit Design
- Wireless Body Area Networks
- Microwave Engineering and Waveguides
- Radio Frequency Integrated Circuit Design
- Advanced Fluorescence Microscopy Techniques
- Protein Degradation and Inhibitors
- Innovative Energy Harvesting Technologies
- Optical Coatings and Gratings
- Chromatin Remodeling and Cancer
- Optical measurement and interference techniques
- Bluetooth and Wireless Communication Technologies
- Cellular transport and secretion
- Optical Coherence Tomography Applications
- Ferroelectric and Negative Capacitance Devices
- Advancements in PLL and VCO Technologies
- Advanced Surface Polishing Techniques
- Internet of Things and Social Network Interactions
- Photoacoustic and Ultrasonic Imaging
- Near-Field Optical Microscopy
- Older Adults Driving Studies
Samsung (South Korea)
2012-2024
SK Group (South Korea)
2015-2023
University of Iowa
2023
Daeduk University
2016-2022
Kumoh National Institute of Technology
2022
Kyung Hee University
2012-2019
Seoul National University
2014-2017
SK Group (United States)
2014
Abstract An automated frequency tracking system is implemented for an efficient mid‐range magnetic resonance wireless power transfer based on analysis of a link consisting transmitting and receiving resonators placed in strong coupling region.The proposed designed to maintain efficiency more than 70% any distance range by directly monitoring the via out‐band communication. The advantage over other schemes that performance amplifier can be applied algorithm. © 2012 Wiley Periodicals, Inc....
The recent development of super-resolution fluorescence microscopy (SRM) has drastically improved the resolution light to order tens nanometers. However, application SRM semiconductor materials remains challenging because fluorophore labeling on inorganic with a high density required for nanoimaging been limited conventional surface functionalization methods. Here, novel approach highly dense material-specific methods silicon-based developed and demonstrated imaging line patterns. This is...
An automated frequency tracking system for an efficient mid-range wireless power transfer is realized based on analysis of magnetic resonance link consisting high-quality factor transmitting and receiving resonators. The proposed automatic adaptive designed to maintain a efficiency higher than 70% any distance by directly monitoring the using communication. advantage over other schemes that efficiencies amplifier can be considered in algorithm. has been successfully demonstrated with...
The recent advances in super-resolution fluorescence microscopy, including single-molecule localization microscopy (SMLM), has enabled the study of previously inaccessible details, such as organization proteins within cellular compartments and even nanostructures nonbiological nanomaterials, polymers semiconductors. With developments, need for development various computational nanostructure analysis methods SMLM images is also increasing; however, this been limited to protein cluster...
Microwave-based wireless power transfer in the near field (up to about 10 m) is now drawing much interest since range when using current magnetic induction or resonance methods limited industry. The Friis efficiency formula valid only far field, so this paper proposes a new for use as well field. proposed derived under assumption that fields generated from transmitting-antenna elements are coherently (or constructively) added at receiving antenna. validated by EM-simulations and measurements...
In this paper, a design of wireless power charging pad based on magnetic resonance coupling is introduced. For highly efficient operation the overall system, efficiency RF TX very important so that 6.78MHz, 30W, 91% class-E amplifier (PA) designed and tracking technique, whose function easily embedded in AC-to-DC converter conventionally used for consumer electronics, applied control. Compared to conventional approach employing additional DC-to-DC control, it presents maximally 20% higher...
We present a novel select gate (SG) lateral coupling embedded nonvolatile memory without any additional steps on 90-nm high-voltage CMOS process. Usually, the SG devices use complex double poly However, continuing technology shrinkage makes method possible for single The of cell is designed to function as control and an at same time, using only capacitance coupling. Because this distinct structure operating principle, has relatively small size, over-erase free, multitime programmable...
Objective This study used a virtual environment to examine how older and younger pedestrians responded simulated augmented reality (AR) overlays that indicated the crossability of gaps in continuous stream traffic. Background Older adults represent vulnerable group pedestrians. AR has potential make task street-crossing safer easier for adults. Method We an immersive conduct with age condition as between-subjects factors. In control condition, participants crossed traffic without overlays....
Power transfer efficiencies of magnetic resonance wireless power link including a relay resonator that is not aligned with the source and device resonators are reported. Based on properties for misalignments two no relay, it possible to explain peculiar in efficiency cases misaligned. All theoretical predictions have been confirmed by measurement results, both which good agreement. Some interesting phenomena pointed out discussed.
An optical microscopy system as a non-destructive method for measuring critical dimension (CD) is widely used its stability and fastness. In case of transparent thin film measurement, it hard to recognize the pattern under white light illumination due transparency reflectance characteristics. this paper, measurement using multispectral imaging CD introduced. The utilizes an Acousto-Optic Tunable Filter (AOTF) illuminate specimen with various monochromatic lights. relationship between...
Nowadays, in the interests of system on chip (SoC) trend many applications, importance embedded flash memory has increased more than ever. However, a technology node shrinks, difficult and delayed production NVM (eNVM) becomes compared to previous larger geometry [1]. Therefore, as smaller, demand for no additional process steps single poly increased, especially foundry fabless companies.
An experiment of 2 (message framing: positive vs. negative) X (issue involvement: high low) factorial design was developed to examine the influence message framing and issue involvement on behavioral intentions adopting abandoned animals. After exposed either positively framed campaign poster or negatively one, 165 participants completed self-administered questionnaires. The results showed that main effect significant. However, both negative have no significantly different intentions. As...
We report a single-poly embedded nonvolatile memory (eNVM) solution for analog trimming and code storage applications using 0.13-μm BCDMOS process. Each cell has its own merits demerits, depending on structure operation methods. For purposes, conventional n-well coupling Fowler-Nordheim tunneling with large unit size of 88 μm2 is used. On the other hand, select gate lateral (SGLC) purposes much smaller 2.82 μm2, which comparable to SRAM. The SGLC fabricated combination only 1.5-V 5-V...
An innovative self-interferometric pupil ellipsometry(SIPE) has been demonstrated to overcome the spectral sensitivity and throughput limitations for optical critical dimensions (OCD) metrology in advanced semiconductor devices. The two orthogonally polarized lights from target structure on wafer were combined through suitably devised polarization state analyzer generate an interferometric fringe pattern surface of SIPE system. measured was processed with our novel holographic reconstruction...
An initial channel access technology using continuous‐wave signals is proposed for establishing stable between a transmitter and multiple receivers in dense environment of loosely coupled (LC) wireless charging pads. Through the experiment, it confirmed that system exhibits fast performance. The time minimum 7 ms maximum 7.82 s faster than conventional technologies with small deviation ranging from 68.2 to 90.4 ms, even an increase number LC chargers area.
This paper clarifies the reason for specific array structure and operation methods of a select gate lateral coupling (SGLC) cell as well its disturbance immunity. An SGLC is type single-poly embedded nonvolatile memory that does not require any additional masks process steps fabrication. It shows excellent features, such high programming speed, small size comparable to SRAM, multitime programmable, over-erase free characteristic. However, reasons cycling limitation have yet been clarified....
In a dense environment of loosely‐coupled wireless charging pads to which out‐of‐band signalling is applied, cross‐connection errors occur according the communication distance signalling. A cross‐connect abatement technique using received‐signal‐strength‐indicator measurement proposed prevent this problem and provide stable charging. To evaluate performance technique, two compact charger environments are created in an RF shield room. The experimental results indicate that system technology...
In this letter, we report a high-performance logic nonvolatile memory for pure processes using novel structure and operations. Even though select gate lateral coupling (SGLC) cell has the advantages of small size, fast programming speed, over-erase-free features, it critical problem on-cell current degradation during relatively number program/erase (P/E) cycles. By installing an assist (AG) on SGLC employing operation methods, cycling performance improved significantly from 100 times to 10 k...
Practical magnetic resonance wireless power transfer (WPT) system is presented. High-efficient amplifier (PA) and adaptive tracking modules are combined with optimized links to propose mid-range powering application scenarios in home-environments.
Efficient wireless charging control scheme for powering a single device unit is presented. The proposed uses in-band communication and analog circuits to the clock signal lengths. Since it can generate data packets without MCU, easy implement one-chip of RX parts. We have verified performance WPT system while mobile in charging.
The novel select gate lateral coupling (SGLC) cell has a single poly structure and operates using between the floating (FG) (SG) without additional processes on base platform. In this paper, we have fabricated pure logic CMOS processed SGLC for first time compared it with an HVCMOS cell. Because of thinner oxide, process lower value than that However, shows higher current performance having thicker oxide. Thanks to inverse relationship ratio current, back bias effect, gives comparable in...
An ultra-compact and wideband low noise amplifier (LNA) in a quad flat non-leaded (QFN) package is presented. The LNA monolithic microwave integrated circuit (MMIC) implemented 0.25 μm GaN IC technology on Silicon Carbide (SiC) substrate provided by Triquint. A source degeneration inductor gate are used to obtain the input matching simultaneously. resistive feedback peaking techniques employed achieve characteristic. chip mounted 3×3-mmSUP2/SUP QFN measured. supply voltages for first second...