Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2003-10-28
2009-06-30
Assouad, Patrick J (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207160, C324S655000
Reexamination Certificate
active
07554324
ABSTRACT:
A proximity sensor system uses a sensor coil as the frequency determining element of an oscillator circuit. The frequency of the oscillator circuit is thus modulated based on the proximity of the sensor coil to a conductive element, thereby supplying a frequency modulated sensor signal. A frequency modulation (FM) detector circuit demodulates the sensor signal, and supplies a signal having an amplitude that varies with, and is representative of, the proximity of the sensor coil to the conductive element.
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Assouad Patrick J
Honeywell International , Inc.
Ingrassia Fisher & Lorenz P.C.
Schindler David M.
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