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Detection of passing magnetic articles with a peak-to-peak percentage threshold detector having a forcing circuit and automatic gain control

  • US 6,297,627 B1
  • Filed: 01/27/1999
  • Issued: 10/02/2001
  • Est. Priority Date: 01/17/1996
  • Status: Expired due to Term
First Claim
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1. A proximity detector for sensing magnetic articles comprising:

  • a) a magnetic-field-to-voltage transducer for generating at an output port thereof a signal voltage, Vsig, that is proportional to a magnetic field;

    b) a peak-to-peak percentage threshold detector having an input port coupled to the output port of said magnetic-field-to-voltage transducer to receive the signal voltage Vsig and for providing an output signal voltage Vout; and

    c) a forcing circuit coupled to said peak-to-peak percentage threshold detector for maintaining the value of the output signal voltage Vout at a first predetermined value during an initial startup interval of the proximity detector.

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