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Sensor having an off-frequency drive scheme and a sense bias generator utilizing tuned circuits

  • US 5,703,292 A
  • Filed: 04/19/1995
  • Issued: 12/30/1997
  • Est. Priority Date: 03/28/1994
  • Status: Expired due to Term
First Claim
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1. A sensor system comprising:

  • an input transducer receiving a drive signal and converting said drive signal into a force signal having a non-linear relationship with respect to said drive signal;

    a sensor responsive to said force signal and an external stimulus for providing a first sensor output signal having a predetermined frequency and being indicative of said force signal and a second sensor output signal having said predetermined frequency and being indicative of said external stimulus;

    a frequency translation circuit responsive to said first sensor output signal for suppressing a component of said first sensor output signal at said predetermined frequency to provide a frequency translated signal capable of producing a force at said predetermined frequency; and

    a tuned circuit responsive to said frequency translated signal for generating said drive signal, wherein said tuned circuit comprises an inductor and a capacitor for amplifying said frequency translated signal, so as to increase the amplitude of said drive signal.

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