A5009369821- Electromagnetic Compatibility and Noise Suppression
- 3D IC and TSV technologies
- Advancements in PLL and VCO Technologies
- Analog and Mixed-Signal Circuit Design
- Wireless Power Transfer Systems
- Energy Harvesting in Wireless Networks
- VLSI and FPGA Design Techniques
- Industrial Vision Systems and Defect Detection
- Indoor and Outdoor Localization Technologies
- Ferroelectric and Piezoelectric Materials
- Algorithms and Data Compression
- Elevator Systems and Control
- Electrical Contact Performance and Analysis
- Optical Network Technologies
- Gaze Tracking and Assistive Technology
- Railway Engineering and Dynamics
- Engineering Applied Research
- Electrostatic Discharge in Electronics
- Innovative Energy Harvesting Technologies
- Low-power high-performance VLSI design
- Vehicle Noise and Vibration Control
- Full-Duplex Wireless Communications
- Metamaterials and Metasurfaces Applications
- Cellular Automata and Applications
- Dielectric materials and actuators
Korea Advanced Institute of Science and Technology
2009-2025
Green Technology Center
2021
In this paper, a tunable multi-split transmitting (TX) coil for wireless power transfer (WPT) system that accommodates wide range of distances between the TX and receiving (RX) coils is proposed. This method enables WPT to maintain stable consistent output supply load, regardless variations in coupling coefficients caused by changes distance RX coils. The can operate various modes depending on how wire connections each are configured. approach adjusts inductance value different conditions,...
Given the interest of researchers for wireless communications in electromagnetic (EM) shadow areas, a magnetic field communication has emerged to overcome RF challenges based on permeability characteristics. However, demerit short range. Considering this limitation, we have proposed GMI sensor-based receiver obtain immunity low-frequency noise and high sensitivity extension range previous studies. Further, paper designs system with including transmitter. Even though basic concept is taken...
Radio reception relies on the medium which determines propagation characteristics of electromagnetic fields carrying information. The permittivity varies greatly depending medium, but it remains nearly constant, except when magnetic materials are used. For this reason, fields, typically affected by permeability, can be utilized in microwave challenging environments. In paper, a new approach based giant magnetoimpedance (GMI) effect is presented. proposed GMI-based receiver has an effective...
A new topology in PLL architecture dual-mode KVCO (DMK) to reduce in-band noise and reference spurs is presented. The DMK also adopts the technique shrink by modulating control voltage. prototype implemented a 65 nm CMOS shows about 3 ps RMS jitter, phase of −107 −109 dBc/Hz at 100 kHz, 1 MHz offset frequency spur 68.5 dBc.
A power‐efficient complementary voltage‐to‐time converter (CVTC) is proposed for a flash ADCs. The alternating reset direction according to the signal development reduces power consumed by operation and operational frequency of CVTC effectively reduced half. Accordingly, logic circuits following work in time‐interleaved manner, resulting significant saving. 5‐bit 2.5 GS/s ADC designed 40 nm CMOS process shows 27% reduction over conventional conversion‐based ADC.
In this paper, the notch-routing is introduced as novel methodology to reduce near-end crosstalk (NEXT) in tightly coupled and short microstrip channel. According high-integration of diverse components a package, space between traces gets narrower, that results increasing NEXT due increased capacitive coupling. We propose modified structure transmission line with uniformly placed notch so decrease The proposed reduces by about 15% at 20 Gbps, secures an additional height 2.2% on eye diagram...
A digital error correction technique with negligible hardware overhead is proposed for binary successive approximation ADCs. redundant decision phase inserted between the normal SAR operations, and coarse caused by incomplete DAC settling corrected a code addition. The relaxed requirement increases conversion speed.
The road noise evaluation method in Korea is based on the 'noise vibration process test standard' by Ministry of Environment. In this method, felt at sound-receiving point measured as LAeq. Recently, order to clarify measurement standards for low-noise pavements, an international standard (ISO11819-2, CPX method) was first introduced Porous Pavement Guidelines Land, Infrastructure and Transport. According ISO, adopts side microphones mandatory, rear microphone optional. Due difference...
In this paper, in order to minimize the reflection generated multi-drop topology, proposed structure insert capacitance into wire bonding finger using a high-K material is presented. The can reduce significant reflected signal due topology at high-frequency range. Return loss improved by about 2.26 dB and 0.24 dB, respectively, 20 GHz for two loadings four systems, insertion also effect. Based on eye diagram, structure, an additional height, width margin obtained 3.4 % 2.0 Gbps system, respectively.
This paper proposes a separated shielding coil showing an excellent effect even in wireless power transfer (WPT) system which misalignment between transmitting (TX) and receiving (RX) occurs. In this paper, the of leakage magnetic field due to is analyzed, using proposed confirmed by simulation. For analysis, electric vehicle (EV) charging with possible was selected, simulations were conducted on standard SAE J2954 model for EV charging. The showed unlike conventional area where significant...
In this paper, we propose a deep reinforcement learning (DRL)-based multi-power distribution network (PDN) decoupling capacitor design optimization method considering transfer noise in 3D-ICs. The from multi-PDN with vertical structures could cause system failure, the entire simultaneous switching (SSN) combined should be considered. To address problem, use suitable for solving complex problems. input dataset and Markov decision process (MDP) were designed to optimize various cases. 5x4 size...
A simple-but-efficient calibration-spur reduction technique is introduced that utilises the digital-and-analogue hybrid return-to-zero (HRZ) method in a current-steering DAC employing round-robin-fashioned background current-source calibration scheme. simulation with 12 b 500 MS/s showed 9.9 and 7.8 dB improvements spur-free dynamic range signal-to-noise + distortion ratio, respectively, owing to reduced spur by proposed HRZ technique.
In this paper, we propose a 3D-IC PDN impedance prediction method using deep learning (DL). Unlike conventional application process (AP) and printed circuit board (PCB) design, our proposes an effective solution to the problem of design 3D-IC, which requires accurate fast evaluation. For prediction, construct regression neural network model based on VGG-16 with additional layers. Additionally, boundary element (BEM) Voronoi diagram are used generate training data. We verified proposed in...
This paper proposes a circuit design method for contactless interconnects using capacitive coupling. The coupling with air as dielectric can provide interconnect applicable to vehicular communication environments. coupler which composed parallel plates is analyzed and modelled equivalent circuits. has the characteristics of high pass filter blocks low frequency range digital signal thus additional recovery circuits are needed. half-duplex OOK modulation proposed overcome such limitations....