Noise canceling single return conductor for multiple signal carr

Details Noise canceling single return conductor for multiple signal carr Noise canceling single return conductor for multiple signal carr

1995-10-20

1997-07-01

Olms, Douglas W.

Multiplex communications

Duplex

381 941, H04B 156

Patent

active

056445741

ABSTRACT:
A system for noise canceling using a single return conductor. The system employs a first unit, a full duplex communications path coupled to the first unit, and a second unit coupled to the first unit via the full duplex communications path. The full duplex communications path employs at least three conductors: a forward signal carrying conductor; a reverse signal carrying conductor; and a single return conductor. In order to perform noise canceling, the first unit may employ, for example, a first adder coupled to the reverse signal carrying conductor, and a first canceling impedance coupled between the single return conductor and a first unit ground. Similarly, the second unit 12 may employ a second adder coupled to the forward signal carrying conductor, and a second canceling impedance coupled between the single return conductor and a second unit ground.

REFERENCES:
patent: 5537011 (1996-07-01), Bachman et al.

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