Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2005-05-31
2005-05-31
Tsai, Carol S. W. (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C455S069000, C700S174000, C340S315000, C340S315000
Reexamination Certificate
active
06901336
ABSTRACT:
A novel technique for transferring power, measurement signals, and communication signals between two electrical devices over a single wire pair is presented. A host device supplies power to a sensor device over the wire pair. The sensor device obtains A/C signals by modulating the current component of the power signal on the wire pair. The host device de-modulates the current component of the power signal on the wire pair to recover the A/C measurement signals. The sensor device generates a serial bit stream containing sensor communication signals, and modulates it with either the voltage-or current-component of the power signal present on the wire pair. The host device appropriately de-modulates the power signal to recover the serial bit stream containing the sensor communication signals.
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Chandler Kevin G.
Crook David T.
Tesdahl Curtis Alan
Agilent Technologie,s Inc.
Tsai Carol S. W.
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