CONTROL OF DEVICES BY WAY OF POWER WIRING
First Claim
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1. A system for controlling a device through a power line, the system comprising:
- a control signal generator for generating a control signal having a frequency within a predetermined frequency band and injecting the control signal onto the power line;
a filter coupled between the single power line and the device, the filter configured to pass signals within the predetermined frequency band to the device and block substantially all other signals, such that the device receives electrical power from the control signal.
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Abstract
A system for controlling one or more devices through a power line comprises one or more control signal generators for generating control signal(s). Each control signal has a frequency within a predetermined frequency band and is injected onto the power line. A filter coupled between the power line and each device. Each filter is configured to pass signals within the corresponding frequency band to the device and block substantially all other signals, such that the device receives electrical power from the high frequency control signal.
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Citations
23 Claims
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1. A system for controlling a device through a power line, the system comprising:
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a control signal generator for generating a control signal having a frequency within a predetermined frequency band and injecting the control signal onto the power line; a filter coupled between the single power line and the device, the filter configured to pass signals within the predetermined frequency band to the device and block substantially all other signals, such that the device receives electrical power from the control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method comprising:
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generating a control signal within a predetermined frequency band; applying the control signal to a power line; filtering signals from the power line to pass only signals within the predetermined frequency band to provide a filtered signal to a device; and
,powering the device with the filtered signal. - View Dependent Claims (21, 22)
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23. An apparatus comprising:
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a filtering circuit connectible to a power line, the filtering circuit configured to pass only signals on the power line within a predetermined frequency band; and
,an electrically powered device coupled to the filtering circuit, the electrically powered device configured to receive electrical power from a filtered signal passed by the filtering circuit.
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Specification