Method and apparatus for interfacing between a twisted pair and

Details Method and apparatus for interfacing between a twisted pair and Method and apparatus for interfacing between a twisted pair and

1993-04-20

1994-09-13

Coles, Sr., Edward L.

Pulse or digital communications

Spread spectrum

Direct sequence

370 48, 375 7, H04L 524, H04B 138

Patent

active

053475496

ABSTRACT:
A transceiver module for coupling between cells in a distributed intelligence network and a twisted pair line. The module receives power from the line and provides power to its respective cell. At the end of transmitting a packet, the transceiver transmits a code violation (pulse), then an anti-code violation (pulse of opposite polarity) to dissipate energy in the line. This is followed by clamping the line for the dead time between packets. N transceivers may be connected (without a cell) to form a repeater. The transceiver module may be used in a network having free topology; that is, an ideal transmission line, with terminators is not needed.

REFERENCES:
patent: 4239934 (1980-12-01), Andren et al.
patent: 4918690 (1990-04-01), Markkula, Jr. et al.
patent: 5148144 (1992-09-01), Sutterlin et al.
patent: 5285481 (1994-02-01), Van Tran
Implementing Twisted-Pair Transceivers with Neuron Chips, Echelon Corporation, Aug., 1991, LonWorks Engineering Bulletin.

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