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:
Jun. 26, 2001
Filed:
Feb. 26, 1998
Marwan A. Fawal, Santa Clara, CA (US);
Burton B. Lo, San Francisco, CA (US);
George Kwan, Sunnyvale, CA (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A system for reducing electromagnetic interference emissions is described. The system can include a network interface card with an Ethernet controller circuit. The Ethernet controller circuit uses a pair of programmable digital to analog converters to generate an Ethernet output signal that includes a pre-emphasis component and a data component. The Ethernet controller circuit monitors the Ethernet output signal and adjust the levels of the pre-emphasis component and the data component by adjusting the values to the digital to analog converters. By making these adjustments, the system reduces the electromagnetic interference caused by the network interface card but maintains valid Ethernet signals.