Method and apparatus for reducing flux imbalance signal...

Details Method and apparatus for reducing flux imbalance signal... Method and apparatus for reducing flux imbalance signal...

2005-05-03

2005-05-03

Liu, Shuwang (Department: 2634)

Pulse or digital communications

Cable systems and components

Transformer coupling

C375S220000, C375S222000, C375S257000, C375S219000

Reexamination Certificate

active

06888896

ABSTRACT:
A method and apparatus for reducing signal distortion in a high speed data communications system caused by a flux imbalance in a system coupling transformer. The signal distortion is monitored by a combination echo canceller circuit connected to the equipment side winding of the transformer, thereby generating an error signal. Changes in the error signal are used by a flux controller to provide a flux cancellation signal. The flux cancellation signal is added with the data signal to generate an offsetting flux signal to the transformer.

REFERENCES:
patent: 3881149 (1975-04-01), Kiko
patent: 4614914 (1986-09-01), Hofer
patent: 6018529 (2000-01-01), Toth
patent: 6067316 (2000-05-01), Amrany et al.
patent: 6522688 (2003-02-01), Dowling

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