G - Physics – 01 – R
Patent
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.
418725
Ise Masahiro
Machino Katsuyuki
Matsubara Toshiyuki
Tanaka Hidehiko
Terasaka Teiji
G. Ronald Bell & Associates
Sharp Kabushiki Kaisha
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