A new twisted differential line structure on high-speed printed circuit boards to enhance immunity to crosstalk and external noise

Author

Kam, Dong Gun ; Lee, Heeseok ; Jonghoon Kim ; Kim, Jonghoon

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

13

Issue

9

fYear

2003

Firstpage

411

Lastpage

413

Abstract

Differential signaling has become a popular choice for high-speed interconnection schemes on Printed Circuit Boards (PCBs), offering superior immunity to external noise. However, conventional differential transmission lines on PCBs have problems, such as crosstalk and radiated emission. To overcome these, we propose a Twisted Differential Line (TDL) structure on a multilayer PCB. Its improved immunity to crosstalk noise and the reduced radiated emission has been successfully demonstrated by measurement. The proposed structure is proven to transmit 3 Gbps digital signals with a clear eye-pattern. Furthermore, it is subject to much less crosstalk noise and achieves a 13 dB suppression of radiated emission.

Keywords

circuit noise; crosstalk; interference suppression; printed circuits; transmission lines; 3 Gbit/s; crosstalk immunity; differential signaling; digital signal transmission; eye pattern; high-speed interconnection; multilayer printed circuit board; noise immunity; radiated emission suppression; transmission line; twisted differential line structure; Circuit noise; Crosstalk; Distributed parameter circuits; Integrated circuit interconnections; Magnetic field measurement; Noise measurement; Nonhomogeneous media; Printed circuits; Strips; Transmission line measurements;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2003.815181

Filename

1232563