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:
Oct. 06, 1998
Filed:
Jun. 10, 1997
Yi Cheng, San Jose, CA (US);
Zhenhua Liu, Sunnyvale, CA (US);
Thomas Jefferson Ronaldue, San Jose, CA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A cable length estimation circuit for receiving an input MLT-3 signal provided through an arbitrary length cable and providing a control signal to an equalizer indicating the estimated length of the cable enabling the equalizer to compensate for distortion of the MLT-3 signal resulting from the cable. The cable length estimation circuit includes an edge rate detection circuit for measuring the rate of change in voltage with respect to time during transitions of the MLT-3 signal to provide an indication of cable length. The cable length estimation circuit can also include a digital averaging circuit which provides an average value for signals from the edge rate detection circuit for a desired number of transitions of the MLT-3 signal. The cable length estimation can also include a baseline wander detection circuit which functions so that previous cable length estimations are provided when baseline wander is detected.