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US 2019/0173427 A1Published application
Temperature compensation of a quartz crystal oscillator
AssigneesSTMicroelectronics (Grenoble 2) SAS, STMicroelectronics (Alps) SAS
InventorsBenoit MARCHAND, Francois DRUILHE
Life of this patent
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Abstract
A quartz crystal resonator is coupled to an electronic circuit. A capacitive or resistive element is provided for adjusting a frequency of the quartz crystal resonator on activation or deactivation of a function of a circuit. Control is made according to a model of an expected variation of a temperature of the quartz crystal resonator.
Claims22
A method of controlling a quartz crystal resonator coupled to an electronic circuit, comprising:
- in response to activation or deactivation of a function of the electronic circuit, controlling at least one capacitive or resistive element for adjusting a quartz crystal resonator frequency according to a model of an expected variation of a temperature of the quartz crystal resonator.
An electronic device, comprising:
- a circuit;
- and
- a quartz crystal resonator;
- wherein the circuit is configured to control at least one capacitive or resistive element for adjusting a quartz crystal resonator frequency, in response to activation or deactivation of a function of an electronic circuit, according to a model of an expected variation of a temperature of the quartz crystal resonator.
1 more element
A circuit, comprising:
- a quartz crystal resonator having a first terminal and a second terminal;
- a first switchable capacitor circuit coupled between the first terminal and a reference node;
- a second switchable capacitor circuit coupled between the second terminal and the reference node;
- a control circuit configured to control operation of the first and second switchable capacitor circuits to adjust a quartz crystal resonator frequency, on activation or deactivation of a function of an electronic circuit, according to a model of an expected variation of a temperature of the quartz crystal resonator.
1 more element
Dependencies are inferred from the claim text.