Reduction of crosstalk noise in modular jack for high-speed differential signal interconnection

2001 ◽  
Vol 24 (3) ◽  
pp. 260-267 ◽  
Author(s):  
Namhoon Kim ◽  
Myunghee Sung ◽  
Hyungsoo Kim ◽  
Seungyong Baek ◽  
Woonghwan Ryu ◽  
...  
Keyword(s):  
High Speed ◽  
Crosstalk Noise ◽  
Differential Signal

scholarly journals Analytical Modeling of Metamaterial Differential Transmission Line Using Corrugated Ground Planes in High-Speed Printed Circuit Boards

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 299 ◽  
Author(s):  
Myunghoi Kim
Keyword(s):  
Analytical Model ◽  
High Speed ◽  
Printed Circuit Boards ◽  
Signal Transmission ◽  
Circuit Boards ◽  
Transmission Characteristics ◽  
Differential Signal ◽  
Printed Circuit ◽  
Full Wave ◽  
Differential Transmission

An analytical model for metamaterial differential transmission lines (MTM-DTLs) with a corrugated ground-plane electromagnetic bandgap (CGP-EBG) structure in high-speed printed circuit boards is proposed. The proposed model aims to efficiently and accurately predict the suppression of common-mode noise and differential signal transmission characteristics. Analytical expressions for the four-port impedance matrix of the CGP-EBG MTM-DTL are derived using coupled-line theory and a segmentation method. Converting the impedance matrix into mixed-mode scattering parameters enables obtaining common-mode noise suppression and differential signal transmission characteristics. The comprehensive evaluations of the CGP-EBG MTM-DTL using the proposed analytical model are also reported, which is validated by comparing mixed-mode scattering parameters Scc21 and Sdd21 with those obtained from full-wave simulations and measurements. The proposed analytical model provides a drastic reduction of computation time and accurate results compared to full-wave simulation.

scholarly journals A High Speed Redundant IO Bus for Energy Power Controller System

2021 ◽  
Vol 2113 (1) ◽  
pp. 012024
Author(s):  
Qinghui Lou ◽  
Liguo Sun ◽  
Haisong Lu ◽  
Weifeng Xu ◽  
Zhebei Wang ◽  
...  
Keyword(s):  
Operating System ◽  
Real Time ◽  
High Throughput ◽  
High Speed ◽  
Low Voltage ◽  
Differential Signal ◽  
Real Time Operating System ◽  
Power Controller ◽  
Data Feedback ◽  
Memory Monitoring

Abstract This paper designs and implements a High Speed Redundant IO Bus for Energy Power Controller System. The physical layer adopts multi-point low-voltage differential signal standard. This bus has the characteristics of high real-time, high throughput and easy expansion. The controller communicates with IO module by A/B bus alternately, monitors link status in real time and collects IO module data. Non real time slots can be used to control non real time messages for IO modules such as time synchronizing and memory monitoring. The controller ARM core runs QNX real-time operating system, and transmits the message needed to communicate with IO modules to the FPGA through DMA. After receiving the message, the FPGA parses the message and automatically fills in the CRC check code and frame end flag at the end of the message. When the FPGA receives the data feedback from the IO module, it performs CRC verification. If the verification passes, it fills the corresponding module receiving buffer. Otherwise, it fills the CRC verification error flag in the register of the corresponding IO module to reduce the load of the arm core.

Pinout Optimization for 10 Gbps+ Serial Link Routing

2010 ◽  
Vol 2010 (1) ◽  
pp. 000588-000592
Author(s):  
David Siadat ◽  
Judy Priest
Keyword(s):  
Critical Factor ◽  
Power Integrity ◽  
Crosstalk Noise ◽  
Noise Levels ◽  
Serial Link ◽  
Differential Signal ◽  
High Frequencies ◽  
Multiple Factors ◽  
Complicated Process ◽  
Better Than

Definition and optimization a BGA (ball grid array) package pinout is a complicated process. Multiple factors must be considered, such as chip level floorplan, board placement of the component, the board stackup, escape routability, and signal and power integrity constraints. These tradeoffs and decisions impact package body size and board real estate, therefore overall system cost. At high frequencies, such as >10 Gbps, the BGA to board via transitions cause visible impedance and noise mismatches and becomes a critical factor in the end to end channel design. Determining BGA pin assignments and their PCB transitions must meet the package crosstalk constraints within the required commodity PCB technology manufacturing rules. This paper describes a methodology of extracting 4 differential signal pairs in the board file from BGA ball to its PCB via transitions through BGA pin field into 3D field solver. The extracted geometry is simulated to determine near-end and far-end crosstalk noise levels between a single victim pair and its associated aggressors. Different pin assignment designs will have different number of aggressors to consider. Different routing layers will also produce different signal via stub lengths (specific resonant frequency) and signal via coupling contributing to far-end crosstalk noise. This may require back drilling of differential signal via stubs to minimize this noise. The aggregated crosstalk noise level must be equal to or better than what the package can deliver. Once these design rules are determined, they can be leveraged across all channels running at the same frequency.

scholarly journals Modeling, Verification and Signal Integrity Analysis of High-Speed Signaling Channel with Tabbed Routing in High Performance Computing Server Board

Electronics ◽  
2021 ◽  
Vol 10 (13) ◽  
pp. 1590
Author(s):  
Kyunghwan Song ◽  
Jongwook Kim ◽  
Hyunwoong Kim ◽  
Seonghi Lee ◽  
Jangyong Ahn ◽  
...  
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
High Speed ◽  
High Performance ◽  
Design Parameters ◽  
Crosstalk Noise ◽  
Segmentation Approach ◽  
The Time Domain ◽  
Integrity Analysis ◽  
3D Em

It is necessary to reduce the crosstalk noise in high-speed signaling channels. In the channel routing area, the tabbed routing pattern is used to mitigate far-end crosstalk (FEXT), and the electrical length is controlled with a time domain reflectometer (TDR) and time domain transmission (TDT). However, unlike traditional channels having uniform width and space, the width and space of tabbed routing changes by segment, and the capacitance and inductance values of tabbed routing also change. In this paper, we propose a tabbed routing equivalent circuit modeling method using the segmentation approach. The proposed model was verified using 3D EM simulation and measurement results in the frequency domain. Based on the calculated inductance and capacitance parameters, we analyzed the insertion loss, FEXT, and self-impedance in the frequency domain, and TDT and FEXT in the time domain, by comparing the values of these metrics with and without tabbed routing. Using the proposed tabbed routing model, we analyzed tabbed routing with variations of design parameters based on self- and mutual-capacitance and inductance.

GENERATION OF A PROBABILISTIC MODEL OF CYCLOSTATIONARY SIGNALS IN TRANSMISSION LINES OF ELECTRONIC DEVICES

2020 ◽  
Author(s):  
М.А. КОНОВАЛЮК ◽  
А.Б. БАЕВ ◽  
А.А. ГОРБУНОВА ◽  
Ю.В. КУЗНЕЦОВ
Keyword(s):  
Transmission Lines ◽  
Computer Aided Design ◽  
High Speed ◽  
Probabilistic Models ◽  
Electronic Devices ◽  
Crosstalk Noise ◽  
Useful Signal ◽  
Probability Densities ◽  
Systems Simulation ◽  
Cyclostationary Signals

При оценке целостности информационных сигналов, передаваемых по высокоскоростным линиям передачи, возникает необходимость в использовании вероятностных моделей случайных процессов. В существующих системах автоматизированного проектирования имитационное моделирование проводится для конечного числа реализаций сигнала, что ограничивает точность оценки статистическиххарактеристик. При проведении контрольных измерений применяются тестовые псевдослучайные последовательности конечной длительности. Контролируемые уровни вероятности ошибки могут составлять величины порядка 10-12. В таких случаях в программном обеспечении измерительной техники прибегают к оцениванию параметров вероятностных моделей. Существующие модели не позволяют проводить обработку сигналов для компенсации помех, вызванных электромагнитными наводками. В данной работе предложена модель двумерных плотностей вероятностей измеренных сигналов и помех, использование которой совместно с методом принципиальных и независимых компонент позволит в будущем компенсировать искажения полезного сигнала за счет наводок. When assessing the integrity of information signals transmitted on high-speed transmission lines, it is necessary to use probabilistic models of random processes. In existing computer-aided design systems, simulation is carried out for a finite number of signal realizations, which limits the prediction capabilities. During compliance tests of electronic devices test pseudo-random sequences of finite length are used. Controlled levels of probabilities can be less than 10-12. In such cases, the software functions provide an estimation of the parameters of probabilistic models for measurement equipment. The existing models do not allow to compensate for interference caused by electromagnetic crosstalk noise. In this paper, the model of two-dimensional probability densities of the measured signals and interference is introduced. This model combined with well-known methods of principal and independent components will allow compensating for the distortion of the useful signal due to interference.

Sign in / Sign up

Export Citation Format

Share Document