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:
May. 07, 2013
Filed:
Apr. 02, 2008
William C. Black, Ames, IA (US);
William C. Black, Ames, IA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
A method and apparatus are provided that allow exploitation of the common mode characteristics of a differential transmission network to provide an additional data signal. Signal represents either a binary signal or a multi-valued signal to allow signaling of one or more bits of information. The signaling occurs through the variation of the common mode voltage in transmitters and is detected using differential receiver. One embodiment is presented that achieves signaling of an extended run length data sequence to allow continued transmitter/receiver synchronization throughout the transmission of the sequence. In an alternate embodiment, a separate data path is provided to signal the extended run length sequence when a common mode signaling path is not available.