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:
Mar. 23, 2010
Filed:
Apr. 17, 2008
William Lo, Cupertino, CA (US);
Yiqing Guo, Cupertino, CA (US);
Tak Tsui, Sunnyvale, CA (US);
Tsin-ho Leung, San Jose, CA (US);
Runsheng He, Sunnyvale, CA (US);
Eric Janofsky, Sunnyvale, CA (US);
William Lo, Cupertino, CA (US);
Yiqing Guo, Cupertino, CA (US);
Tak Tsui, Sunnyvale, CA (US);
Tsin-Ho Leung, San Jose, CA (US);
Runsheng He, Sunnyvale, CA (US);
Eric Janofsky, Sunnyvale, CA (US);
Marvell International Ltd., Hamilton, BM;
Abstract
A physical layer device includes a cable test module that transmits a test pulse on a cable, measures a reflection amplitude, calculates a cable length, and determines a cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer selectively outputs a plurality of signals at a plurality of frequencies on one end of the cable. An insertion loss calculator receives the signals from an opposite end of the cable and estimates insertion loss based on the received signals.