Analysis and compensation circuit for an inductive...

Details Analysis and compensation circuit for an inductive... Analysis and compensation circuit for an inductive...

2011-08-30

2011-08-30

Patel, Paresh (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

C324S207150

Reexamination Certificate

active

08008909

ABSTRACT:
A circuit arrangement for analysis and compensation of the signals for an inductive displacement sensor is provided. The circuit includes a first operating amplifier, a second operating amplifier and a coil for a displacement measurement, in parallel with the second operating amplifier output and the second operating amplifier first input and connected to a capacitance in series with the coil inductance and coil resistance to form an RLC series tuned circuit. In order to improve the accuracy of a measured resonance frequency, the circuit arrangement can be extended with a second coil for a temperature compensation, by connecting a first of the ends of the coil winding to a second end of the coil winding of the first coil and a second of the ends of the coil winding to the second input of the first operating amplifier.

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International Search Report dated Aug. 3, 2007 w/English translation (four (4) pages).

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