System And Method For Providing Both Power And Control To Circuits Coupled Serially To A Single Conductor
First Claim
1. A digitally controlled power and control system for providing power and control data on a single conductor output line, said digitally controlled power and control system comprising:
- a current source for driving a nominally constant direct current on said single conductor output line;
a data interface circuit, said data interface circuit for receiving control data;
a data frame buffer for storing at least one data frame, said data frame containing a subset of said control data received on said data interface circuit and an address to select a subset of addressed circuits coupled to said single conductor output line; and
a modulator circuit, said modulator circuit modulating said data frame containing said subset of said control data onto said nominally constant direct current on said single conductor output line by creating detectable current deviations from said nominally constant direct current.
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Abstract
To power and control multiple different electronic circuit nodes, this document introduces a single-wire multiple-circuit power and control system. Specifically, individually controlled circuit node units are arranged in a series configuration that is driven by a power and control unit located at the head of the series.
Each of the individually controlled circuit node units may comprise more than one output circuit that is also individually controllable. The head-end power and control unit provides both electrical power and control signals down a single wire to drive all of the individual circuit node units in the series in a manner that allows each individual circuit node unit to be controlled individually or in assigned groups.
26 Citations
20 Claims
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1. A digitally controlled power and control system for providing power and control data on a single conductor output line, said digitally controlled power and control system comprising:
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a current source for driving a nominally constant direct current on said single conductor output line; a data interface circuit, said data interface circuit for receiving control data; a data frame buffer for storing at least one data frame, said data frame containing a subset of said control data received on said data interface circuit and an address to select a subset of addressed circuits coupled to said single conductor output line; and a modulator circuit, said modulator circuit modulating said data frame containing said subset of said control data onto said nominally constant direct current on said single conductor output line by creating detectable current deviations from said nominally constant direct current. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of providing power and control data on a single conductor output line, said method comprising:
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driving a nominally constant direct current on said single conductor output line with a power supply; receiving control data with a data interface circuit; storing at least one data frame in a data frame buffer, said data frame containing a subset of said control data received on said data interface circuit and an address to select a subset of addressed circuits coupled to said single conductor output line; and modulating said data frame in said data frame buffer onto said nominally constant direct current by creating detectable current deviations from said nominally constant direct current with a modulator circuit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification