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Apparatus for and method of compensating for variations due to aging

  • US 4,633,422 A
  • Filed: 07/26/1983
  • Issued: 12/30/1986
  • Est. Priority Date: 07/26/1983
  • Status: Expired due to Fees
First Claim
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1. Apparatus for compensating for variations due to aging in resonant frequency characteristics of an electromechanical resonator, said compensating apparatus comprising an oscillator including the resonator, means responsive to the number of cycles generated by the oscillator for deriving a first signal indicative of the amount of time that the oscillator has been operating, computer means responsive to the first signal for deriving a second signal having a value indicative of a correction factor for the resonator aging, and means for controlling the frequency of the oscillator in response to the value of the second signal.

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