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Reducing far-end crosstalk in chip-to-chip communication systems and components

a communication system and chip-to-chip technology, applied in the field of systems for reducing far-end crosstalk (fext), can solve the problems of relatively insufficient reduction efforts of fext, and achieve the effect of big improvement of total fex

Inactive Publication Date: 2010-07-22
HIROSE ELECTRIC GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a system and method for reducing interference in data transmission, called FEXT (fiber optic crosstalk). The invention involves reversing the polarity of signals in a differential pair of lines, which cancels out the FEXT from previous sources. This can be applied to chip packages, connectors, printed circuit boards, and other systems that experience FEXT. The invention also includes optimizing the location of polarity reversal to achieve maximum FEXT cancellation. The technical effects of the invention include improved data transmission with reduced interference and improved signal quality.

Problems solved by technology

However, such attempts have been relatively insufficient in reducing FEXT, particularly in higher frequency systems.

Method used

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  • Reducing far-end crosstalk in chip-to-chip communication systems and components
  • Reducing far-end crosstalk in chip-to-chip communication systems and components

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Embodiment Construction

[0038]In the following detailed description, reference will be made to the accompanying drawing(s), in which identical functional elements are designated with like numerals. The aforementioned accompanying drawings show by way of illustration, and not by way of limitation, specific embodiments and implementations consistent with principles of the present invention. These implementations are described in sufficient detail to enable those skilled in the art to practice the invention and it is to be understood that other implementations may be utilized and that structural changes and / or substitutions of various elements may be made without departing from the scope and spirit of present invention. The following detailed description is, therefore, not to be construed in a limited sense.

[0039]FIG. 1 shows an example of a chip-to-chip communication system, where the signal sent by the transmitter 101 can go through multiple chip packages 102, connectors 103, and traces 104 and vias 105 in ...

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Abstract

The present invention involves chip-to-chip communication systems for reducing Far-End Crosstalk (FEXT) through the use of novel polarity swapping to negate the cumulative effect of FEXT. Skew adjustment is used to improve the FEXT cancellation from polarity swapping. The polarity reversal location or locations among FEXT sources are optimized to achieve maximum FEXT cancellation. The novelty polarity swapping technique can be applied to a wide variety of systems that can benefit from FEXT reduction.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This regular U.S. patent application is based on and claims the benefit of priority under 35 U.S.C. 119 from provisional U.S. patent application No. 61 / 146,614, filed on Jan. 22, 2009, the entire disclosure of which is incorporated by reference herein.FIELD OF THE INVENTION[0002]This invention relates in general to systems for reducing Far-End Crosstalk (FEXT) and, more particularly, towards the reduction of FEXT in chip-to-chip communication systems that are transmitting differential signals and may include both differential and single-ended signals.DESCRIPTION OF THE RELATED ART[0003]As the circuit speed increases, differential signaling has become a preferred method for data transmission in such applications as personal computers, servers, switches, and routers.[0004]For the differential victim pair being considered, unwanted electromagnetic coupling (i.e., crosstalk) from neighboring aggressor pairs occurs throughout the data transmiss...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04M1/76H04M9/00
CPCH04M1/76H05K1/0245H05K2201/09245H05K2201/10689
Inventor ARAI, TATSUYAHUANG, CHING-CHAOLUK, CLEMENT KAM LAMBUAN, JEREMYMATSUO, TSUTOMUTAKADA, TOSHIYUKINAGATA, MASAKAZU
Owner HIROSE ELECTRIC GROUP
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