ZXnoise-B IP portfolio

Name of the intellectual property portfolio: ZXnoise-B.

Sectors: high-performance computing (servers), chip manufacturing.
Technical areas: high-speed electrical interconnections, signal integrity.

Title of the patent family Family
Pseudo-differential receiving circuit P39
Method for pseudo-differential transmission using modal electrical variables P43
Method for pseudo-differential transmission using natural electrical variables P44
Multichannel interfacing device having a switching circuit P45
Transmission device using a plurality of elementary return conductors P46
Method for pseudo-differential transmission using a non-uniform interconnection P48

This portfolio is no longer offered for sale, effective 25 october 2016.

This portfolio comprises the items listed in the following table. To obtain the latest relevant document, click in the "Item ID" column. To get more due diligence information, please contact us.

Item ID Jurisdiction Application No. Filing date Patent or PCT publ. No. Issue Date Family
P39-A France 08/03830 7 July 2008 FR 0803830 20 Aug 2010 P39
P39-B PCT PCT/IB2009/051053 13 March 2009 WO 2010/004442 N/A
P39-C USA 12/960,832 6 Dec 2010 US 8,896,361 25 Nov 2014
P43-A France 08/04429 4 Aug 2008 FR 0804429 13 Aug 2010 P43
P43-B PCT PCT/IB2009/052638 19 June 2009 WO 2010/015947 N/A
P43-C USA 13/005,627 13 Jan 2011 US 8,049,576 1 Nov 2011
P44-A France 08/04430 4 Aug 2008 FR 0804430 27 Aug 2010 P44
P44-B PCT PCT/IB2009/052645 19 Jun 2009 WO 2010/015948 N/A
P44-C USA 13/017,675 31 Jan 2011 US 8,461,937 11 Jun 2013
P45-A France 09/00042 8 Jan 2009 FR 0900042 11 Feb 2011 P45
P45-B PCT PCT/IB2009/055287 23 Nov 2009 WO 2010/079390 N/A
P45-C USA 13/074,453 29 Mar 2011 US 8,599,872 3 Dec 2013
P46-A France 09/00161 15 Jan 2009 FR 0900161 1 Nov 2013 P46
P46-B PCT PCT/IB2009/055295 23 Nov 2009 WO 2010/082093 N/A
P46-C USA 13/167,336 23 June 2011 US 8,338,992 25 Dec 2012
P48-A France 09/04611 28 Sep 2009 FR 0904611 10 Feb 2012 P48
P48-B PCT PCT/IB2010/051863 28 Apr 2010 WO 2011/036573 N/A
P48-C USA 13/175,000 1 July 2011 US 8,193,875 5 June 2012


     The patent families P39, P43, P44, P45, P46 and P48 are mainly intended to be applied to the ZXnoise techniques for the reduction of external crosstalk and echo in electrical interconnections such as the one used in a system in package (SiP), a multi-chip module (MCM) or a printed circuit board (PCB). The ZXnoise method improves the performance of pseudo-differential links (PDLs) used to obtain m transmission channels, using an interconnection having m transmission conductors and a return conductor distinct from the reference conductor (ground). A PDL is intended to provide low external crosstalk, using fewer conductors than m differential links.

     Examples of granted patents relating to pseudo-differential links include: US 6,195,395 (Assignee: Intel), US 6,594,769 (Assignee: Intel), US 6,847,617 (Assignee: Intel), US 7,099,395 (Assignee: Rambus), US 7,208,972 (Assignee: IBM), US 7,239,213 (Assignee: IBM), US 7,403,040 (Assignee: Samsung), US 7,768,298 (Assignee: Samsung) and US 7,868,790 (Assignee: Samsung). A short introduction to the ZXnoise techniques is available in the Section 1 of this page. Several peer-reviewed technical articles published on this subject matter may be downloaded here. Excem also offers two Seminars and a free electronic book presenting the technical background for assessing and implementing this technology.

     The patent families P39, P43, P44, P45 and P46 can be used to combine the ZXnoise technique with the ZXtalk technique, to obtain a reduction of internal and external crosstalk. A short presentation of the ZXtalk method is available in the Section 3 of this page. Several technical articles published on this subject matter may be downloaded here.

     The patent family P48 is necessary for expanding the applicability of the ZXnoise methods to an interconnection which cannot be modeled as a uniform multiconductor transmission line, for instance an interconnection extending from a first chip to a second chip.

     The ZXnoise-B portfolio is presented in this slide show. For a conference with technical experts, please contact us. We can also provide several reports relating to these inventions.

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