Industry Patents

Patent: 5588021

Repeater for use in a Control Network

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Patent Number:	5588021
Title:	Repeater for use in a Control Network
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.
Country of Issue:	US
First Named Inventor:	Hunt, Murray
Assignee:	Light & Sound Design
Continuation or Divisional of:
International Classification:	H04B 17/02
US Classification:	375/211
Issue Date:	12-24-1996
Filing Date:	06-24-1993
Application :	80717
Notes:
Link to Patent at freepatentsonline.com:	5588021 at Freepatentsonline
Link to World Patent Family¹:	World Patent Family at European Patent Office
Link to Google Patents¹:	5588021 at Google Patents

1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.

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