The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 28, 2009
Filed:
Aug. 28, 2008
Rubina Firdaus Ahmed, Cary, NC (US);
Moises Cases, Austin, TX (US);
Bradley Donald Herrman, Cary, NC (US);
Kent Barclay Howieson, Austin, TX (US);
Bhyrav Murthy Mutnury, Austin, TX (US);
Pravin Patel, Cary, NC (US);
Peter Robert Seidel, Cary, NC (US);
Rubina Firdaus Ahmed, Cary, NC (US);
Moises Cases, Austin, TX (US);
Bradley Donald Herrman, Cary, NC (US);
Kent Barclay Howieson, Austin, TX (US);
Bhyrav Murthy Mutnury, Austin, TX (US);
Pravin Patel, Cary, NC (US);
Peter Robert Seidel, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method of electrically qualifying high speed printed circuit board (PCB) connectors includes mounting a PCB connector on a test card, sending bit patterns through a first portion of the test card, evaluating a waveform on a sense signal on a second portion of the test card for the bit patterns launched on said first portion of the test card to measure common mode noise, and comparing the measured common mode noise of the second portion of the test card to a golden standard performed on a pre-qualified connector. The first portion of the test card comprises connectors to inject bit patterns. The second portion of the test card includes a split plane which induces common mode noise on a sense signal, the sense signal, and a termination pack. If the measured common mode noise on the PCB connector is worse than the golden standard, then the PCB connector is disqualified. If the measured common mode noise on the PCB connector is as good as or better than the golden standard, then the PCB connector is qualified. A first section of the PCB connector connects to the first portion of the test card and a second section of the PCB connector connects to the second portion of the test card. Transmission lines in the test card and the sense line are tightly coupled by shortening a distance between the sense line and the transmission lines.