ZXnoise-A IP portfolio

Name of the intellectual property portfolio: ZXnoise-A.

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

Title of the patent family Family
Pseudo-differential interfacing device having a termination circuit P35
Pseudo-differential interfacing device having a balancing circuit P36
Pseudo-differential interfacing device having a switching circuit P37
Method and device for pseudo-differential transmission P38

This portfolio is no longer offered for sale, effective 25 october 2016.To obtain publicly available information on assignments, please click in the "Patent or PCT publ. No." column below.

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
P35-A France 07/04421 21 Jun 2007 FR 0704421 11 Feb 2011 P35
P35-B PCT PCT/IB2008/051826 8 May 2008 WO 2008/155676 N/A
P35-C USA 12/598,357 9 Nov 2009 US 7,932,741 26 April 2011
P36-A France 07/04889 6 Jul 2007 FR 0704889 11 Feb 2011 P36
P36-B PCT PCT/IB2008/051942 16 May 2008 WO 2009/007864 N/A
P36-C USA 12/598,376 9 Nov 2009 US 7,952,380 31 May 2011
P37-A France 07/04949 9 Jul 2007 FR 0704949 2 Oct 2009 P37
P37-B PCT PCT/IB2008/051982 20 May 2008 WO 2009/007866 N/A
P37-C USA 12/599,114 6 Nov 2009 US 7,884,648 8 Feb 2011
P38-A France 07/05260 20 July 2007 FR 0705260 11 March 2011 P38
P38-B PCT PCT/IB2008/052102 29 May 2008 WO 2009/013644 N/A
P38-C USA 12/599,086 6 Nov 2009 US 8,248,177 21 Aug 2012


     The patent families P35, P36, P37 and P38 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 family P37 may also be applied to pseudo-differential transmission links which do not implement the ZXnoise technique, to obtain bidirectional signaling. The patent family P36 may also be used to reduce simultaneous switching output noise (SSO noise) generation in any parallel link, including links implementing the ZXtalk method defined in the Section 3 of this page.

     The patent family P37 (US 7,884,648) was referenced by USPTO examiners during the prosecution of US 8,125,241 (assigned to LSI Corporation) and US 8,410,841 (assigned to Semiconductor Components Industries, LLC).

     The ZXnoise-A 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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