System and method for providing temperature correction in a crystal oscillator
View Patent ↗A system and method for providing temperature compensation in a oscillator component (such as a crystal oscillator component) that includes a closely-located temperature sensing device. The crystal oscillator component in example systems and methods is exposed to a temperature profile during a calibration procedure. Temperature and frequency data are collected and applied to coefficient generating function according to a temperature compensation model to generate a set of coefficients that are used in the temperature compensation model in an application device. The generated coefficients are stored in a coefficient memory accessible to an application device during operation.
1. A system for calibrating an oscillator component, comprising:
an application device containing the oscillator component and a data interface; and
an external calibration controller coupled to the application device through the data interface,
wherein the external calibration controller controls the application device through the data interface to execute an application that utilizes the oscillator component to determine a temperature profile of the application device.
2. The system of claim 1 , including:
a temperature chamber enclosing the application device and coupled to the external calibration controller,
wherein the temperature chamber is controlled by the external calibration controller to vary a temperature applied to the application device.
3. The system of claim 2 , wherein
the external calibration controller varies the temperature applied to the application device and measures the frequency of the oscillator component through the data interface.
4. The system of claim 2 , wherein
the external calibration controller controls the application device to enter a calibration mode through the data interface, and
the application device performs an application in the calibration mode while the external calibration controller varies the temperature applied to the application device.
5. The system of claim 4 , wherein
the application device acquires a GPS signal while performing a GPS application,
the application device determines a frequency error between the oscillator component and the GPS signal,
the application device outputs the determined frequency error to the external calibration controller through the data interface, and
the external calibration controller determines the temperature profile of the application device based on the frequency error.
6. The system of claim 1 , wherein
the temperature profile of the application device is based on the temperature effects of the oscillator component and other components included in the application device.