Woojin Jang

An Innovative Approach for Advanced Packaging in 3D System Integration using Reconstructed Wafer-to-Wafer Bonding

Sang Hoon Lee, Kyoung-Lim Suk, Woojin Jang, Gwang‐Jae Jeon et autres

Advanced package architecture and integration are among the most important technologies in high-performance HPC and AI systems of 3D system interconnection. This paper introduces an innovative approach for heterogeneous integration in a new 3D system called reconstructed wafer-to-wafer (W2W) for high-performance computing …

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28.5 A 94.1%-Efficiency Parallel-SC Hybrid Buck Converter Designed Using VCR-Aware Topology Optimizer for a 4.2A/mm² Current-Density FoM

Hyunki Han, Jeong-Hyun Cho, Woojin Jang, Yousung Park et autres

Increasing power density—delivering more power in a smaller footprint—stands as a pervasive trend across multiple markets, including the sector for buck DC-DC converters. One of the cardinal challenges in achieving optimized power density is navigating the intrinsic trade-off between an inductor’s volume …

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14.10 34.7A/mm2 Scalable Distributed All-Digital 6×6 Dot-LDOs Featuring Freely Linkable Current-Sharing Network: A Fine-Grained On-Chip Power Delivery Solution in 28nm CMOS

Yong-Jin Lee, Woojin Jang, Hong-Hyun Bae, Jeong‐Hyun Cho et autres

As modern SoCs become more power-intensive, the distributed LDO architecture is emerging as a solution for on-chip power delivery [1] –[6]. Multiple digital LDO (D-LDO) units cooperate inside this framework to regulate supply voltage via a shared power grid network. By evenly …

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A Pipeline ADC with Negative C-assisted SC Amplifier Canceling Gain Error and Nonlinearity

Woojin Jang, Gyeong-Gu Kang, Yong Lim, Hyun‐Sik Kim

A 12-b pipeline ADC based on a new negative$\boldsymbol{C}$- assisted MDAC is presented. Proposed negative$\boldsymbol{C}$scheme aids to cancel gain error and nonlinearity by generating negative charges at the summing node during the amplification phase. A design strategy for ensuring stability even when …

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A 12-Bit Mobile OLED/μLED Display Driver IC with Cascaded Loading-Free Capacitive Interpolation DAC and 6.24V/μs-Slew-Rate Buffer Amplifier

Gyeong-Gu Kang, Seok-Tae Koh, Woojin Jang, Jiho Lee et autres

This paper presents an OLED/μLED display driver IC with cascaded loading-free capacitive interpolation (LFCI) DAC and a high-slew buffer amplifier. The 12-bit color-depth is realized by a combination of 7-bit R-DAC and proposed 5-bit LFCI DAC while occupying only 295×17μm2, which is …

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Development of a Walking-type Solar Panel Cleaning Robot Capable of Driving on Inclined Solar Panel

Sung Gwan Park, Woojin Jang, Dong Hwan Kim

Design and Analysis of a 12-b Current-Steering DAC in a 14-nm FinFET Technology for 2G/3G/4G Cellular Applications

Jae-Kwon Kim, Woojin Jang, Yanghoon Lee, Wan Kim et autres

A 14-nm FinFET CMOS 12-b current-steering digital-to-analog converter (DAC) for 2G/3G/4G cellular applications is presented herein. Bit segmentations of a 6-bit thermometer and 6-bit binary coding are adopted, utilizing switching-order shuffling in combination with dynamic element matching (DEM) to suppress the spurious …

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Conceptual Design for construction of Closed Circuit Power Line Communication(CPLC) based Tunnel Lighting Control Technology in Linked with Train Location Information

Bu-Seok Kwon, Jung-Wook Park, Woojin Jang, Jong-Bin Park et autres

조명은 글로벌 전기의 19%를 소비하는 분야로, 에너지 비용과 온실가스 배출량을 감소시키기 위한 각국 정부의 대책 마련이 분주한 가운데 LED조명이 그 대안으로 확대되고 있는 추세이다. LED 조명기구는 소비전력이 적고, 수명이 기존의 전구에 비해 길어 고효율, 친환경적이며 제어가 용이하다. 이러한 이유로 각종 사회 기반시설에 …

Development of a Distributed Parallel Computing Framework to Facilitate Regional/Global Gridded Crop Modeling with Various Scenarios

Woojin Jang, Tegenu A. Engda, Jason C. Neff, J. Herrick

A 12-b, 1-GS/s 6.1 mW current-steering DAC in 14 nm FinFET with 80 dB SFDR for 2G/3G/4G cellular application

Jae-Kwon Kim, Woojin Jang, Yanghun Lee, Seunghyun Oh et autres

A 14nm FinFET CMOS 12-b current-steering digital-to-analog (DAC) for 2G/3G/4G cellular applications is presented. A bit segmentation of 6-bit thermometer and 6-bit binary is adopted, and it utilizes the dynamic element matching (DEM) technique to suppress the spurious tones caused by the …

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Design of AHRS using Low-Cost MEMS IMU Sensor and Multiple Filters

Woojin Jang, Chansik Park

A Study on Railroad Vehicle Lighting Environment

Og-Goo Kang, Woojin Jang

This paper investigates the lighting environment of railway system which are mainly used in KTX, Saemaul and Mugunghwa. When lighting used in KTX such as fluorescent lamp and incandescence is being replaced with LED lamp, illumination load of each railroad vehicle has …