• Title, Summary, Keyword: crosstalk

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A Minimum Crosstalk Wire Spacing Method by Linear Programming (선형프로그래밍에 의한 최소 혼신 배선간 간격조정방법)

  • 전재한;임종석
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.40 no.11
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    • pp.62-72
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    • 2003
  • This paper deals with a crosstalk minimization method by wire spacing. The suggested method uses linear programming method and consider crosstalk of both horizontal segments and vertical segments. In this paper, we suggest a method which can predict the coupling length between vertical segments in the final routing result using longest path algorithm. By the suggested method, we can make LP problem without integer variable. Therefore, it is much faster to solve the problem. In the case of crosstalk optimization, the suggested method optimized peak crosstalk 11.2%, and 3% total crosstalk more than wire perturbation method. The execution time of the suggested method is as fast as it takes 11 seconds when Deutsch is optimized.

A Study on a Reduced Crosstalk for the Design of 100 MHz High Speed Data Transmission Modular Jack (Crosstalk를 방지한 100 MHz 고속 데이터 전송 Modular Jack의 설계 및 제작에 관한 연구)

  • 이중근;안현수
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.10 no.1
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    • pp.1-10
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    • 1999
  • In this paper, a method of canceling and suppressing differential-mode crosstalk-noise signals caused by non-uniform coupling between two transmission lines in UTP(Unshielded Twisted Paris) modular jacks is discussed. Differential-mode crosstalk-noise signals in balanced transmission lines in UTP modular jacks were suppressed by inserting auxiliary capacitance between balanced transmission line pairs which are located closely enough to be effectively coupled each other. To verify the effectiveness of the inserted capacitances, precisely calculated auxiliary capacitances were applied to 10 pin modular jacks which are used in local area networks at 100 Mb/s with unshielded twisted pair-cables. The NEXT(Near-End Crosstalk) losses were measured to prove its applicability.

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Efficient Interconnect Test Patterns and BIST Implementation for Crosstalk and Static Faults (Crosstalk과 정적 고장을 고려한 효과적인 연결선 테스트 알고리즘 및 BIST 구현)

  • Min Pyoungwo;Yi Hyunbean;Song Jaehoon;Park Sungju
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.42 no.7
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    • pp.37-44
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    • 2005
  • This paper presents effective test patterns and their BIST implementations for SoC and Board interconnects. Initially '6n'algorithm, where 'n' is the total number of interconnect nets, is introduced to completely detect and diagnose both static and crosstalk faults. Then, more economic 4n+1 algorithm is described to perfectly capture the crosstalk faults for the interconnect nets separated within a certain distance. It will be shown that both algorithms can be easily implemented as interconnect BIST hardwares with small area penalty than conventional LFSR.

Analysis of Crosstalk-Induced Variation of Coupling Capacitance between Interconnect lines in High Speed Semiconductor Devices (고속 반도체 소자에서 배선 간의 Crosstalk에 의한 Coupling Capacitance 변화 분석)

  • Ji Hee-Hwan;Han In-Sik;Park Sung-Hyung;Kim Yong-Goo;Lee Hi-Deok
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.42 no.5
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    • pp.47-54
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    • 2005
  • In this paper, novel test patterns and on-chip data are presented to indicate that the variation of coupling capacitance, ${\Delta}Cc$ by crosstalk can be larger than static coupling capacitance, Cc. It is also shown that ${\Delta}Cc$ is strongly dependent on the phase of aggressive lines. for anti-phase crosstalk ${\Delta}Cc$ is always larger than Cc while for in-phase crosstalk ${\Delta}Cc$ is smaller than Cc. HSPICE simulation shows good agreement with the measurement data.

CROSSTALK CORRECTION OF THE KMTNet MOSAIC CCD IMAGE (KMTNet 모자이크 CCD 영상의 크로스톡 보정)

  • KIM, SEUNG-LEE;CHA, SANG-MOK;LEE, CHUNG-UK;KIM, DONG-JIN;PARK, BYEONG-GON;LEE, YONGSEOK;PARK, HONG SOO;KYEONG, JAEMANN;CHUN, MOO-YOUNG
    • Publications of The Korean Astronomical Society
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    • v.31 no.3
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    • pp.35-41
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    • 2016
  • We have constructed a wide-field photometric survey system called as the Korea Microlensing Telescope Network (KMTNet) in 2015. It consists of three 1.6 m optical telescopes equipped with mosaic CCD cameras. Four 9k CCDs were installed on the focal plane of each telescope. In this paper, we present the crosstalk analysis of the KMTNet mosaic CCD images. The crosstalk victims caused by bright sources were visible at eight sub-images obtained through different readout ports of each CCD. The crosstalk coefficients were estimated to be several tens of $10^{-4}$ in maximum, differing from sub-image to sub-image, and the non-linearity effect certainly appeared at the victims made from saturated sources. We developed software functions to correct the crosstalk effect of the KMTNet CCD images. The software functions showed satisfying results to remove clearly most of the crosstalk victims and have been implemented in the KMTNet image processing pipeline since 2015 September.

A Function of Resolution and Display Quality in LCD (LCD 에서 해상도와 Display Quality 의 상관관계)

  • 최승규;강인병;송영철
    • Proceedings of the IEEK Conference
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    • pp.343-346
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    • 2003
  • In this paper, we try to make a systematic analysis for the vertical crosstalk on LCD driving. The vertical Crosstalk is one of the inevitable phenomena in the high-resolution TFT-LCDs. At first, the vortical Crosstalk is defined. Considering the structure of the pixels and data lines, a LCD (a pixel) is modeled electrically by its' equivalent circuit. The circuit is verified by experiment and used to find the cause of the vertical Crosstalk.

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Analysis and Reduction of Crosstalk on Coupled Microstrip tines by Using FDTD Method

  • Pichaya Supanakoon;Monchai Chamchoy;Panarat Rawiwan;Prakit Tangtisanon;Sathaporn Promwong;Teerasilpa Dumwipata;Takada, Jun-ichi
    • Proceedings of the IEEK Conference
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    • pp.523-526
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    • 2002
  • The crosstalk among coupled microstrip lines is the major limiting factors of signal qualities in the high-speed digital and communication equipment. In this paper, a three-dimensional finite difference time domain (FDTD) method is applied to analyze the crosstalk between the coupled microstrip lines. The proposed structures of the coupled microstrip lines are investigated to reduce the coupling in a simple way by modifying their ground plane with an optimum gap. The examples of these structures with the different sizes of the gaps on their ground plane are studied. These structures are considered as the four-port network to evaluate transmission efficiency, near- and far-end crosstalk. Gaussian pulse is excited to evaluate the frequency characteristics from dc to 30 ㎓. The transmission efficiency, near- and far-end crosstalk of each structure of the coupled microstrip lines are demonstrated. The numerical results of this study show that the majority of crosstalk is the far-end crosstalk. The usage of the optimum gap on the ground plane can reduce the far-end crosstalk of the coupled microstrip lines while the transmission efficiency is nearly equal.

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Crosserase and Crosstalk Effects on Readout Signal of Digital Versatile Disks (Crosserase와 crosstalk이 DVD 재생 신호에 미치는 영향)

  • Park, Yeon-Soo;Kim, Ji-Won;Jo, Soon-Chul
    • Journal of the Institute of Electronics Engineers of Korea CI
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    • v.38 no.4
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    • pp.33-38
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    • 2001
  • Readout signal of high density DVD-RAM disk output was simulated to analyze the effect of crosserase and crosstalk to the readout signal which is one of the main difficulties to realize high density DVD-RAM system having single side recording density of 4.7 G13 and 15 G13 media. Laser beam intensity impinged on the disk was approximated as Gaussian and recorded marks were assumed elliptical and the readout signal was calculated as a two dimensional convolution of laser beam pattern and recored mark pattern. From the readout signal obtained by varying crosserase ratio, carrier levels with period of 3T to 11 T were calculated and compared. Jitter due to crosserase and crosstalk was calculated and compared using 1,000 random marks having 3T to 11T period. The results showed that the jitter due to crosserase turned out to be smaller than the jitter due to crosstalk.

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Test Generation for Multiple Line Affecting Crosstalk Effect (다중 전송선에 영향을 받는 Crosstalk 잡음을 위한 테스트 생성)

  • Lee, Young-Gyun;Yang, Sun-Woong;Kim, Moon-Joon;Chang, Hoon
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.39 no.9
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    • pp.28-36
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    • 2002
  • As cross-coupling capacitance generated in transmission line has been an important issue in VLSI world, a couple of ATPG algorithms has been proposed. However they were studied only for a simple single-line effect problem, so it cost so much time for an unsatisfying test generation efficiency. In this paper, we studied a noise model for multiple affected lines and generated test patterns in a short time. This paper proposes a crosstalk model affected by multiple tranmission lines and implemented an ATPG algorithm for detection of crosstalk noise faults. We modeled the crosstalk noise by multiple transmission line and made a truth table for this. We implemented an ATPG algorithm based on PODEM and revealed the results.

Diagnosis of Multiple Crosstalk-Faults in Optical Cross Connects for Optical Burst Switching (광 버스트 스위칭을 위한 광 교환기에서의 다중 누화고장 진단기법)

  • 김영재;조광현
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.3
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    • pp.251-258
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    • 2003
  • Optical Switching Matrix (OSM) or Optical Multistage Interconnection Networks (OMINs) comprising photonic switches have been studied extensively as important interconnecting blocks for Optical Cross Connects (OXC) based on Optical Burst Switching (OBS). A basic element of photonic switching networks is a 2$\times$2 directional coupler with two inputs and two outputs. This paper is concerned with the diagnosis of multiple crosstalk-faults in OSM. As the network size becomes larger in these days, the conventional diagnosis methods based on tests and simulation become inefficient, or even more impractical. We propose a simple and easily implementable algorithm for detection and isolation of the multiple crosstalk-faults in OSM. Specifically. we develop an algorithm for isolation of the source fault in switching elements whenever the multiple crosstalk-faults arc detected in OSM. The proposed algorithm is illustrated by an example of 16$\times$16 OSM.