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:
Aug. 21, 2012
Filed:
May. 05, 2008
Justin Potok Bandholz, Cary, NC (US);
Thomas Dixon Pahel, Jr., Raleigh, NC (US);
Pravin Patel, Cary, NC (US);
Philip Louis Weinstein, Apex, NC (US);
Justin Potok Bandholz, Cary, NC (US);
Thomas Dixon Pahel, Jr., Raleigh, NC (US);
Pravin Patel, Cary, NC (US);
Philip Louis Weinstein, Apex, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
According to one embodiment, an apparatus has first and second connectors configured for removably connecting to one another. The first connector circuit has a first differential amplifier, a first differential signal path, a first capacitor section capacitively coupling the first differential amplifier to the first differential signal path, and a first DC biasing circuit for imparting a first DC bias to the first differential signal path opposite the first capacitor section. The second connector circuit has a second differential amplifier, a second differential signal path, a second capacitor section capacitively coupling the second differential amplifier to the second differential signal path, and a second DC biasing circuit for imparting a second DC bias to the second differential signal path opposite the second capacitor section having a different magnitude than the first DC bias when the first and second connector are not connected. One or both of the first and second connector circuits is configured for detecting a change in the first or second DC bias and outputting a connection status signal in response to the detected change.