Electricity: measuring and testing – Conductor identification or location – Inaccessible
Patent
1986-07-17
1988-12-13
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Conductor identification or location
Inaccessible
73718, 73724, 324 60C, 34087016, G01R 2726
Patent
active
047913525
ABSTRACT:
A transmitter provides an output representative of a parameter. A generating circuit in the transmitter senses the parameter and provides charge packets having adjustable magnitudes to a measurement circuit. The measurement circuit measures the quantity of charge and provides a measurement signal representing the charge to a feedback circuit. The feedback circuit is controlled by the measurement signal and provides timed feedback signals to the generating means. The feedback signals control the generation and magnitude of the charge packets such that the charge coupled to the measurement circuit is finely balanced in a short measurement interval. The feedback means counts the number of charge packets provided during a measurement interval such that the numbers counted are representative of the sensed parameter.
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Frick Roger L.
Schulte John P.
Eisenzopf Reinhard J.
Mueller Robert W.
Rosemount Inc.
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