최근 초고화질(4K-UHD) 영상 시스템의 신호전송은 비압축 고속 데이터로 전송되며 고속 신호의 인터페이스 구간에 서로 다른 케이블 사이에서 나타나는 EMI, 스큐(skew) 문제로 인하여 영상신호의 왜곡, 지터 등으로 시스템 구현에 한계가 있다. 이와 같이 비압축 고속 데이터를 고속전송하기 위하여 V-by-One HS 인터페이스 기법을 적용하여 본 논문에서는 고속 영상신호에 대하여 HSD(High Speed Differential) 전송선로의 신호무결성을 분석하였다. UHD 영상패턴 제어 인터페이스의 PCB 설계 방법을 RF 전송기법으로 적용하였으며 구현된 4K-UHD급 영상패턴 제어 신호발생기의 V-by-One HS 영상신호를 측정한 결과, 전송품질이 고속전송 신호규격에 만족함을 보였다.

Uhd급 영상패턴 제어를 위한 전송선로의 신호 왜곡현상 분석

A Study on Architecture Design of Output Module for SIL4 Safety Related System

This paper introduces the architecture of the power supply in order to achieve the safety integrity target for power supply which is a part of safety related system. The integrity level for safety is set 4 and according to the IEC 62425 which is standard for railway application the architecture design is conducted and process for design is developed. The procedure for design consists with 6 steps. The architecture of power supply that is able to keep the safety integrity against of failure of power supply is derived through the analysis and it is suggested that the power supply adopted the result in this paper is suitable to apply in safety system. Also, the failure frequency that is a quantitative value for the power supply is proposed.

http://www.koreascience.or.kr:80/article/JAKO201532742223650.pdf

A Study on Architecture Design of Power Supply for SIL4 Safety Related System

In this paper, a mushroom typed electromagnetic band gap (EBG) structure to be inserted in the printed circuit board (PCB) inner layer in order to stabilize the PCB power line is proposed for global-navigation satellite service (GNSS). In designing the proposed EBG structure, the target stop-bandwidth was designed from 1.55GHz to 1.81GHz including GNSS and mobile communication-related frequency bandwidth. In this bandwidth, the insertion loss(S21) was observed below about –40dB. From the simulation results, it is expected that the stabilization of power delivery network (PDN) structure in the PCB circuit design should be improved and the effective correspondence to EMI will be helpful.

Design of Electromagnetic Band Gap Structure for Global Navigation Satellite Service

Recently signal transmission of ultra high-definition(4K-UHD) video system is transferred as uncompressed high speed data. However, this has a limit to compose the system because EMI between separate cables of high speed interface section and skew bring distortion of the video signal and jitter. In this paper we applied V-by-One HS interface technique to transfer uncompressed high speed data. We analyzed HSD(High Speed Differential) transmission line signal integrity. Also we applied RF transmission technique instead of UHD video pattern control interface PCB design. When we measured V-by-One HS video signal of designed 4K-UHD class signal generator, We found that the transmission performance has been signal standard.

Analysis of Signal Distortion for Ultra High Definition Video Pattern Control

This paper introduces the reduction design technique of the resonance phenomenon of the inner PCB based on power integrity from the analysis about the inner power supply line generating RLC resonance. With the technique, the resonant frequency resulted from the structural characteristics of the PCB can be analyzed and allows to predict and the capacitor for resonance phenomenon reduction can be decided as a decoupling capacitor. From the simulation result, it was confirmed that the PCB's resonance phenomenon reduction design technique should have the reduction effect in the inner motherboard of the industrial controller. This research will be contributed to the improvement of the safety of a PDN (Power Delivery Network) structure in the layout design technique of the PCB.

/pdf/a-study-on-source-stability-design-method-by-power-integrity-150ohv44uh.pdf

Ki-Hyun Chung

Papers

A study on Source Stability Design Method by Power Integrity Analysis

Design of Electromagnetic Band Gap Structure for Global Navigation Satellite Service