Communications: electrical – Systems – Selsyn type
Patent
1988-05-03
1989-12-05
Orsino, Joseph A.
Communications: electrical
Systems
Selsyn type
340310CP, 340538, 340310R, H04M 1106
Patent
active
048855634
ABSTRACT:
A power line carrier communication system having a carrier current transceiver (CCT) interface with an electrical power line via a buffer which automatically provides a low output drive impedance while transmitting, and a high receiving impedance when receiving, all with solid state circuitry. The length of signal transmission by the CCT is monitored and automatically prevented from continuously loading the communication network in the event of a malfunction which causes a signal transmission to exceed normal maximum transmission time. Prevention of continuous loading of the communication circuit is accomplished without adverse affect on the CCT via a crowbar circuit connected to the buffer circuitry.
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Anderson Arthur A.
Boomgaard Dirk J.
Johnson Richard A.
Lackey D. R.
Orsino Joseph A.
Thermo King Corporation
Tumm Brian R.
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