A.C. ELECTRICAL SUPPLY SIGNALLING ARRANGEMENTS

A.C. ELECTRICAL SUPPLY SIGNALLING ARRANGEMENTS

A receiver for an a.c. electrical supply signalling arrangement of the kind in which information is transmitted by impressing on the supply voltage wave form voltage reductions which bridge the zero crossings in the waveform wherein detection by the receiver of an impressed voltage reduction is achi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: LEEDHAM, CHARLES G, GRAY, FREDERICK M
Format: Patent
Sprache:eng ; fre
Schlagworte:
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
ELECTRICITY
GENERATION
SYSTEMS FOR STORING ELECTRIC ENERGY
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Beschreibung
Zusammenfassung:A receiver for an a.c. electrical supply signalling arrangement of the kind in which information is transmitted by impressing on the supply voltage wave form voltage reductions which bridge the zero crossings in the waveform wherein detection by the receiver of an impressed voltage reduction is achieved by comparing the integral of the supply voltage over a period immediately preceding a voltage zero crossing when a voltage reduction is present with a corresponding integral obtained when no voltage reduction is present.