Repeater for use in a control network

Details Repeater for use in a control network Repeater for use in a control network

1993-06-24

1996-12-24

Vu, Kim Yen

Pulse or digital communications

Repeaters

375213, 375220, 370246, H04B 1702, H04B 138

Patent

active

055880215

ABSTRACT:
A repeater for use in a control network includes isolating transformers at its root input/output and at a plurality of branch input/outputs. There is a line receiver and a line driver circuit associated with each of the isolating transformers. To determine the direction of transmission of signals through the repeater, there is a common mode voltage detector which detects a common mode voltage imposed on the wiring to the root side of the root transformer. A corresponding common mode voltage is imposed by the repeater on the branch side of each of the branch transformers. The repeater also includes a logic circuit for testing the validity of signals received from the branches and ensuring that only valid signals are passed to the root transformer.

REFERENCES:
patent: 4912723 (1990-03-01), Verbanets, Jr.
patent: 5010459 (1991-04-01), Taylor et al.
patent: 5119398 (1992-06-01), Webber, Jr.
patent: 5125006 (1992-06-01), Marinaro
patent: 5209560 (1993-05-01), Taylor et al.
patent: 5329431 (1994-07-01), Taylor et al.

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