Data communication network providing power and message informati

Details Data communication network providing power and message informati Data communication network providing power and message informati

1991-03-28

1992-09-15

Ng, Jin F.

Communications: electrical

Systems

Selsyn type

375 36, H04M 1104

Patent

active

051481448

ABSTRACT:
A data communications network for delivering power and communications over the same cable bundle includes a plurality of communications nodes wherein associated with each of the nodes is a transformer having a core, a primary winding and a secondary winding. The secondary winding has a centertap connection which either splits or merges the current in the secondary winding to eliminate net DC flux within the transformer. A DC/DC converter is also included for transforming the relatively high DC voltage of the cable down to a regulated supply potential for use by that node. The converter is coupled between the centertap of the transformer and the cable bundle. A power source provides the DC voltage distributed across the network and is coupled to the cable bundle via a centertap connection of another winding.

REFERENCES:
patent: 4788448 (1988-11-01), Crowe
patent: 5032819 (1991-07-01), Sakuragi et al.
patent: 5065133 (1991-11-01), Howard

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