Signal splitter

Details Signal splitter Signal splitter

2011-06-21

2011-06-21

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S126000, C333S129000, C333S132000

Reexamination Certificate

active

07965153

ABSTRACT:
A signal splitter comprising an input and a plurality of outputs is provided, wherein alternate outputs are connected to phase shifting devices. The phase shifting devices preferably comprise phase shifting transformers and introduce a phase shift of 180°, so that noise components of alternate outputs are antiphase and cancel one another out almost entirely when the signals are summed. Also provided is a cable television network comprising a plurality of such signal splitters to ensure that noise ingress in upstream signals passing into the network is substantially reduced.

REFERENCES:
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patent: 5126704 (1992-06-01), Dittmer et al.
patent: 5347245 (1994-09-01), Wright, Jr.
patent: 6118354 (2000-09-01), Decramer et al.
patent: 6542047 (2003-04-01), Chen et al.
patent: 6806790 (2004-10-01), Ji
patent: 6965280 (2005-11-01), Chen

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