Patent ID: 7369003

Claim:
An oscillator system, comprising: a plurality of microelectromechanical resonators 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 first 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 second frequency function of temperature, and a third microelectromechanical resonator to generate a third output signal having a frequency that varies with operating temperature, wherein the third microelectromechanical resonator includes a third frequency function of temperature; and frequency manipulation circuitry, coupled to the first, second and third microelectromechanical resonators, to generate an output signal having frequency that is substantially stable over a predetermined range of operating temperatures using the first, second and third frequency functions of temperature to cancel at least a first-order temperature dependent term of the first, second and third output signals, exclusive of the use of temperature sensing means separate from the first, second and third microelectromechanical resonators.