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. 24, 2012
Filed:
Mar. 29, 2010
Koen Van Den Brande, Brussels, BE;
Maarten Kuijk, Antwerp, BE;
Koen Van Den Brande, Brussels, BE;
Maarten Kuijk, Antwerp, BE;
Eqcologic NV, Brussels, BE;
Abstract
A cable driver () for driving a single ended transmission medium such as a coaxial cable () comprising a core () and a shield () comprises a differential driver () comprising a first output () for putting a first signal to the core () of the single ended transmission medium (), a second output () for putting a second signal to the shield () of the single ended transmission medium () through a termination resistor () having an impedance close to the characteristic impedance (Z) of the single ended transmission medium (), and a third output () for putting a transmit ground supply signal (GNDT), local to the differential driver, to the shield () of the single ended transmission medium () through a first high frequency low impedance path (). In use, the current through the third output () will be substantially the inverse of the common mode current through the first and second outputs (). Hence both the common mode current and its inverse are provided to the single ended transmission medium (). They cancel each other out and thus advantageously low EMI emissions occur.