Circuit for serial data communication and power transmission
AssigneeGold Star Tele-Electric Co., Ltd., Inc.
InventorChoe J. Tae
Life of this patent
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Abstract
A circuit for serial data communication and power transmission between a main controller and a sub-station along two balanced transmission lines. The circuit includes a power supply for providing a DC voltage to the sub-station along the transmission lines. A main controller sending circuit generates two data signals of substantially equal magnitude and opposite polarity and supplies the data signals to the transmission lines. A sub-station receiving circuit detects the data signals, on the transmission lines and converts the data signals into a serial format output data signal.
Claims12
A circuit for serial data communication and power transmission between a main controller and sub-station along two balanced transmission lines, comprising:
- power supply means for providing a DC voltage to the sub-station along the transmission lines, said power supply means including DC voltage supply means and choke coils coupled between the DC voltage supply means and the transmission lines;
- main controller sending means for generating two first data signals of substantially equal magnitude and opposite polarity in response to a first serial format input signal, and supplying the first data signals along the transmission lines;
- sub-station receiving means for detecting first data signals on the transmission lines and converting the first data signals into a first serial format output data signal;
- and
- regulating means, coupled to the transmission lines for supplying a DC bias voltage to the sub-station receiving means from the DC voltage provided by the power supply means, said regulating means including choke coils coupled to the transmission lines for substantially eliminating non-DC components from the DC bias voltages.
Dependencies are inferred from the claim text.