Circuit for serial data communication and power transmission
First Claim
1. 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.
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Accused Products
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.
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Citations
12 Claims
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1. A circuit for serial data communication and power transmission between a main controller and sub-station along two balanced transmission lines, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification