Power frequency detection system

Details Power frequency detection system Power frequency detection system

G - Physics

01

R

324/37

G01R 19/175 (2006.01)

Patent

CA 1198476

Abstract of the Disclosure A signal transmission system utilizes the electrical power distribution wiring of a building or house as the data transmission line. Within the signal transmission system a detection system is required to detect the frequency component of the power distribution voltage. The detection system includes a zero-crossing level detection circuit for developing a detect- ion output when each zero-crossing is detected in the voltage on the distrubution wiring. A timer element is provided in the frequency detection system, which functions to cause the block- ing of an output signal from the zero-crossing level detection circuit for a preselected time period after each detection out- put, thus avoiding spurious output signals caused by noise.

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