Data transfer rates on printed circuit boards are quickly approaching speeds that challenge the limits of todays technology. Inter-chip communication has increased dramatically. Currently data rates have reached 3.125 Gb/s on standard circuit board, but chip-to-chip digital communication has currently reached a plateau and several problems need to be addressed to significantly increase data transfer rates. Inductive and capacitive components of far end crosstalk (FEXT) conveniently cancel each other as they propagate on an interconnect transmission line, however the inductive and capacitive components of near end crosstalk(NEXT) add together and interfere with signals on adjacent receivers.<p>This paper proposes a novel solution for canceling crosstalk by adding extra circuitry to the receiver within the integrated circuit. This digital circuit delivers one of three appropriate levels of crosstalk compensation to the incoming signal. Since the circuit is digital, simple blocks can be used to implement it on a complimentary metal-oxide semiconductor (CMOS) integrated circuit and consume very little extra silicon.<p>This paper presents the compensation circuit and reports the results of the simulations, which demonstrate improved performance over the standard system. The compensation circuit is specifically aimed at adjacent input and output lines on a microchip. Simulations of a typical circuit board configuration operation have shown crosstalk that is only 15 dB lower than a received attenuated signal. The crosstalk cancellation circuit has been shown to improve this by as much as 10 dB.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:SSU.etd-02062004-170915 |
| Date | 11 February 2004 |
| Creators | Boos, Bernie |
| Contributors | McCrosky, Carl, Johanson, Robert E., Faried, Sherif O., Dodds, David E., Bolton, Ronald J., Salt, J. Eric |
| Publisher | University of Saskatchewan |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://library.usask.ca/theses/available/etd-02062004-170915/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Saskatchewan or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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