D.c. signal receiving circuit arrangements

Details D.c. signal receiving circuit arrangements D.c. signal receiving circuit arrangements

H - Electricity

02

H

328/166, 348/39

H02H 3/08 (2006.01) H04L 25/02 (2006.01) H04L 25/08 (2006.01)

Patent

CA 1036705

ABSTRACT OF THE DISCLOSURE The two threshold circuits of a receiving circuit arrangement are supplemented by a third threshold circuit which is responsive to an excessive current occurring or a connected receiving line to cause the two threshold circuits to indicate by their output signals a fictive state of current on the line. A logic circuit is responsive to such output signals to open a line switch, which is automatically closed again after a predetermined delay or in response to a signal from an additionally provided monitoring circuit.

215214

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