Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1991-06-17
1992-10-06
Harvey, Jack B.
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324654, 32420716, 340941, 331 65, G01R 2726
Patent
active
051535254
ABSTRACT:
An inductive sensor is driven by a series resonant oscillator circuit to produce an oscillator signal having a frequency which is a function of inductance of the inductive sensor. An inductive load, which includes the sensor, is connected in series with a capacitive impedance. Power to the series resonant circuit formed by the inductive load and the capacitive impedance is controlled as a function of current in the series circuit as sensed by a current sensor. A detection system provides a detector output based upon the frequency of the oscillator signal.
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Hamer Steven M.
Hoekman Earl B.
Barte William B.
Brown Glenn W.
Griswold Gary L.
Harvey Jack B.
Kirn Walter N.
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