Patent ID: 7443258
Filing Date: 2008-10-28
Classification: G01C,G01P,H03B,H03H

Abstract:
1. An oscillatory system, comprising: 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 of the first microelectromechanical resonator; 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 of the second microelectromechanical resonator; frequency manipulation circuitry, coupled to the first and second microelectromechanical resonators to generate a third signal having frequency that is substantially stable over a predetermined range of operating temperatures using the first and the second frequency function of temperature to cancel at least a first-order temperature dependent term of the first and second output signals, exclusive of the use of temperature sensing means separate from the first and second microelectromechanical resonators; and control circuitry configured to: