Crystal oscillator emulator
First Claim
Patent Images
1. An integrated circuit comprising:
- a microelectromechanical (MEMS) resonator circuit that generates a reference frequency and that includes;
a semiconductor oscillator that generates resonator drive signal having a drive frequency; and
a MEMS resonator that receives said resonator drive signal;
a temperature sensor that senses a temperature of said integrated circuit; and
memory that stores calibration parameters and that selects at least one of said calibration parameters as a function of said sensed temperature, wherein said drive frequency is based on said calibration parameters.
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Abstract
An integrated circuit comprises a microelectromechanical (MEMS) resonator circuit that generates a reference frequency and that includes a semiconductor oscillator that generates resonator drive signal having a drive frequency and a MEMS resonator that receives the resonator drive signal. A temperature sensor senses a temperature of the integrated circuit. Memory stores calibration parameters and selects at least one of the calibration parameters as a function of the sensed temperature, wherein the drive frequency is based on the calibration parameters.
115 Citations
33 Claims
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1. An integrated circuit comprising:
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a microelectromechanical (MEMS) resonator circuit that generates a reference frequency and that includes;
a semiconductor oscillator that generates resonator drive signal having a drive frequency; and
a MEMS resonator that receives said resonator drive signal;
a temperature sensor that senses a temperature of said integrated circuit; and
memory that stores calibration parameters and that selects at least one of said calibration parameters as a function of said sensed temperature, wherein said drive frequency is based on said calibration parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 32)
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11. An integrated circuit comprising:
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microelectromechanical (MEMS) means for generating a reference frequency and that includes;
semiconductor oscillating means for generating a resonator drive signal having a drive frequency; and
a MEMS resonator means for receiving said resonator drive signal and for resonating;
temperature sensing means for sensing a temperature of said integrated circuit; and
storing means for storing calibration parameters and for selecting at least one of said calibration parameters as a function of said sensed temperature, wherein said drive frequency is based on said calibration parameters. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 33)
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21. A method comprising:
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providing a microelectromechanical (MEMS) resonator circuit that generates a reference frequency and that includes;
a semiconductor oscillator that generates resonator drive signal having a drive frequency; and
a MEMS resonator that receives said resonator drive signal;
sensing a temperature of said integrated circuit; and
storing calibration parameters;
selecting at least one of said calibration parameters as a function of said sensed temperature, wherein said drive frequency is based on said calibration parameters. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification