Oscillators – With device responsive to external physical condition
Reexamination Certificate
2011-04-12
2011-04-12
Pascal, Robert (Department: 2817)
Oscillators
With device responsive to external physical condition
C324S207150, C324S207160, C324S207260
Reexamination Certificate
active
07924105
ABSTRACT:
The present invention relates to a method for the detection of a predamping state of an inductive sensor. The sensor has at least one oscillator with a resonant circuit and an oscillation amplifier. According to the method the oscillatory response of the oscillator is analyzed with an operating amplification or gain. According to the invention the method is further developed in that the oscillatory behavior of the oscillator is additionally analyzed for an analysis amplification or gain, which is chosen lower than the operating amplification. The analysis amplification is also chosen in such a way that the oscillatory response of the oscillator reacts sensitively to objects or articles located in close proximity to the sensor. The invention also relates to an inductive sensor with predamping detection.
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European Search Report, Application No. EP 08 00 4168, Completion Date Oct. 2, 2008.
Gannon Levi
Hoffman Warnick LLC
Merecki John A.
Pascal Robert
PEPPERL + FUCHS GmbH
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