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Microelectromechanical oscillator and method of operating same

  • US 7,369,004 B2
  • Filed: 07/26/2006
  • Issued: 05/06/2008
  • Est. Priority Date: 06/14/2006
  • Status: Active Grant
First Claim
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1. An oscillator system, comprising:

  • a temperature measurement system including;

    a first microelectromechanical resonator to generate a first output signal having a frequency that varies with operating temperature, wherein the first microelectromechanical resonator includes a frequency function of temperature;

    a second microelectromechanical resonator to generate a second output signal having a frequency that varies with operating temperature, wherein the second microelectromechanical resonator includes a frequency function of temperature;

    frequency division circuitry, coupled to the first and second microelectromechanical resonators, to determine data which is representative of the operating temperature of the first and/or second microelectromechanical resonator using (i) data which is representative of the frequency of the first output signal and (ii) data which is representative of the frequency of the second output signal;

    frequency manipulation circuitry, coupled to the first and second microelectromechanical resonators, to generate a third output signal using the first and second output signals; and

    clock alignment circuitry, coupled to the temperature measurement system and frequency manipulation circuitry, to generate an output signal having frequency which is substantially stable over a predetermined operating temperature using (i) the third output and (ii) the data which is representative of the operating temperature of the first and/or second microelectromechanical resonator.

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