Reduction of noise in a metallic conductor signal pair using...

Details Reduction of noise in a metallic conductor signal pair using... Reduction of noise in a metallic conductor signal pair using...

2007-06-08

2010-06-01

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Transmission line inductive or radiation interference...

C333S005000, C333S017300, C333S02400C, C333S032000

Reexamination Certificate

active

07728692

ABSTRACT:
In order to reduce noise on twisted metallic pair signal conductors, circuits are disclosed in which the signal balance between the wires of the pair is significantly improved, thereby reducing the line's susceptibility to external electromagnetic interference and equally reducing its ability to radiate signals into the surrounding medium. Further, the common mode impedance of the wire pair as seen at or close to the junction with the terminating equipment is controlled in order to reduce the ability of signals external to the wire pair to couple into the wire. This reduces noise in the line, as perceived by connected equipment, leading to an increase in the data carrying capacity of the line and the usable length of the line carrying such data.

REFERENCES:
patent: 4191155 (1980-03-01), Nishio et al.
patent: 5095291 (1992-03-01), Staschover et al.
patent: 5109206 (1992-04-01), Carlile
patent: 6097262 (2000-08-01), Combellack
patent: 6917255 (2005-07-01), Mathias et al.

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