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. 29, 2001
Filed:
Dec. 23, 1999
John M. Williamson, Stittsville, CA;
Nortel Networks Limited, Montreal, CA;
Abstract
A signal transmission device including an input for receiving an input electrical signal containing a succession of pulses. The input signal has a high data rate, preferably in excess of 10 gigabits per second. The signal is split in two identical specimens, referred to as first signal and second signal and injected in respective channels of a lossy transmission path whose function is to carry the signals to an intended destination. Before introducing the second signal in the respective channel of the lossy signal transmission path, a negative DC shift is applied to the second signal. During the transmission of the first and the second signals through the lossy signal transmission path, they are subjected to distortions that cause the leading and the trailing edges of pulses in the signals to spread out. To compensate for this distortion, the first and the second signals are processed at the destination by first and second functional units that comprise non-linear signal transmission paths. The first functional unit effects compression of the leading edge of the pulses in the first signal while the second functional unit effects compression of the trailing edges of pulses in the second signal. The outputs of the functional units are combined into one signal containing the pulses from the input signal but substantially free of the distortions introduced by the lossy signal transmission path.