Hafe-duplex two-wire DC power-line communication system

Details Hafe-duplex two-wire DC power-line communication system Hafe-duplex two-wire DC power-line communication system

1998-06-08

1999-11-16

Lefkowitz, Edward

Communications: electrical

Systems

Selsyn type

340538, 340539, 34082507, 307106, H04M 1104

Patent

active

059865393

ABSTRACT:
A powerline communication system comprises a master and slave configuration in which the master provides both operating power and control commands to the slave over a single pair of wires. The slave, in turn, is able to communicate its status to the master with a return communications channel on the same pair of wires. Each sender impresses its signals on the power lines with an isolation transformer coupled to the gate of a power MOSFET transistor that shunts the power lines. Each receiver samples the signals from the sender with an isolation transformer that has its primary winding placed in series with the power lines. The master initiates a synchronizing pulse and places data in various timeslots. The slave follows with an initiating sync pulse followed by data in a group of timeslots. Edge-detection, rather than level-detection is used at the receivers for added immunity to supply and load changes. A double-pulse sync is used for special time slot reporting.

REFERENCES:
patent: 3917916 (1975-11-01), Ghosh et al.
patent: 4413250 (1983-11-01), Porter et al.
patent: 4427974 (1984-01-01), Sheahan
patent: 4459582 (1984-07-01), Sheahan et al.
patent: 4568909 (1986-02-01), Whynacht
patent: 4788527 (1988-11-01), Johansson
patent: 4926158 (1990-05-01), Zeigler
patent: 5424709 (1995-06-01), Tal
patent: 5614811 (1997-03-01), Sagalovich et al.
Keyence Sensors for Factory Automation, New, Super-Micro PLC with Advanced, Remote I/O . . . It's the Worlds Smallest, Fastest and Lowest in Cost, product ad, Mar. 1998, pp. 1-3.

Affiliated with

Also associated with

Rating

Hafe-duplex two-wire DC power-line communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hafe-duplex two-wire DC power-line communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hafe-duplex two-wire DC power-line communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1329648