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Signal conditioning system for inductive position sensor

  • US 7,292,026 B2
  • Filed: 04/07/2006
  • Issued: 11/06/2007
  • Est. Priority Date: 04/08/2005
  • Status: Active Grant
First Claim
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1. An apparatus for providing an output signal correlated with a part position for a moveable part over a positional range, the apparatus comprising:

  • a transmitter coil, the transmitter coil producing an electromagnetic field when excited by an exciter signal;

    a receiver coil located proximate to the transmitter coil, the receiver coil generating a receiver signal when the transmitter coil is excited due to inductive coupling between the transmitter coil and the receiver coil, the receiver signal being sensitive to the part position;

    a reference coil, providing a reference signal substantially independent of the part position;

    a signal conditioner receiving the receiver signal and the reference signal, the signal conditioner including an analog divider generating a ratio signal from the receiver signal and the reference signal,the output signal being obtained from the ratio signal.

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