Design and verification of differential transmission lines

Wu, Hao; Beyene, W.T.; Cheng, Nai-Shuo; Huang, Ching-Chao; Yuan, Chuck

doi:10.1109/epep.2001.967617

Cited by 17 publications

(7 citation statements)

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“…To ensure reliable operation at such a high data rate, differential signaling has become a popular choice for multigigabit digital applications, such as Serial-ATA, Fiber Channel, Inifiniband, OIF, RapidIO, and XAUI [1]. This is because the differential signaling is more robust, in that it is less susceptible to external noise.…”

Section: Introductionmentioning

confidence: 98%

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

Kam

Lee

Kim

et al. 2003

IEEE Microw. Wireless Compon. Lett.

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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.

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Section: Introductionmentioning

confidence: 98%

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

Kam

Lee

Kim

et al. 2003

IEEE Microw. Wireless Compon. Lett.

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“…Since the differential signal is referenced to itself, it has the advantage of common mode noise suppression [3]. But, the differential pair has the disadvantage that the routing area is twice as big as the single end transmission line.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth improvement of multilayer common mode filter by time domain method

Tseng

Liao

Ling

2009

2009 IEEE International Symposium on Electromagnetic Compatibility

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In demand of high-speed differential data communication, the common mode filter is usually presented.The new common mode filter demonstrated in this paper is designed by edge-coupled differential pairs. By using double loops routing structure, the coupling inductance is increased. To achieve sufficient common mode noise suppression while introducing minimal signal insertion loss, the full-wave time domain EM simulator is applied.

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“…Indeed, the design roadmap of the Semiconductor Industry Association (SIA) forecasts that a board-level clock frequency will be over 1 GHz in 2005 [2]. In order to ensure reliable operation at such a high data rate, differential signaling has become a popular choice for multigigabit digital applications [3]. Differential signaling implies that two signal traces are generated with equal magnitudes with a 180 phase difference between the two.…”

Section: Introductionmentioning

confidence: 99%

“…In order to support the differential signaling, differential lines are required. Conventional differential line structures on multilayer PCBs include coupled microstrip lines (MCLIN), coplanar strips, edge-coupled striplines, and broadside-coupled striplines [3]. However, all of these have an unsolved problem, namely, differential-mode crosstalk between neighboring differential pairs.…”

Section: Introductionmentioning

confidence: 99%

Twisted differential line structure on high-speed printed circuit boards to reduce crosstalk and radiated emission

Kam

Lee

Kim

2004

IEEE Trans. Adv. Packag.

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Abstract-Differential signaling has become a popular choice for high-speed digital interconnection schemes on printed circuit boards (PCBs), offering superior immunity to crosstalk and external noise. However, conventional differential lines on PCBs still have unsolved problems, such as crosstalk and radiated emission. When more than two differential pairs run in parallel, a line is coupled to the line adjacent to it because all the lines are parallel in a fixed order. Accordingly, the two lines that constitute a differential pair are subject to the differential-mode crosstalk that cannot be canceled out by virtue of the differential signaling.To overcome this, we propose a twisted differential line (TDL) structure on a high-speed multilayer PCB by using a concept similar to a twisted pair in a cable interconnection. It has been successfully demonstrated by measurement and simulation that the TDL is subject to much lower crosstalk and achieves a 13-dB suppression of radiated emission, even when supporting a 3-Gb/s data rate.

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Design and verification of differential transmission lines

Cited by 17 publications

References 0 publications

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

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

Bandwidth improvement of multilayer common mode filter by time domain method

Twisted differential line structure on high-speed printed circuit boards to reduce crosstalk and radiated emission

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