Systems and methods for frequency compensation of real-time-clock systems
First Claim
1. A method for temperature-dependent frequency compensation, the method comprising:
- determining a first frequency compensation as a first function of temperature using one or more crystal oscillators;
processing information associated with the first frequency compensation as the first function of temperature; and
determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature;
wherein;
the one or more crystal oscillators do not include the crystal oscillator; and
the first frequency compensation as the first function of temperature is different from the second frequency compensation as the second function of temperature;
wherein the determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature includes;
measuring an actual frequency of the crystal oscillator at a selected temperature;
determining a third frequency compensation for the crystal oscillator at the selected temperature based at least in part on the measured actual frequency;
processing information associated with the third frequency compensation for the crystal oscillator at the selected temperature; and
determining the second frequency compensation for the crystal oscillator as the second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature and the third frequency compensation for the crystal oscillator at the selected temperature;
wherein the determining a third frequency compensation for the crystal oscillator at the selected temperature based at least in part on the measured actual frequency includes determining the third frequency compensation equal to a desired frequency of the crystal oscillator at the selected temperature minus the actual frequency of the crystal oscillator at the selected temperature.
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Accused Products
Abstract
Method and system for temperature-dependent frequency compensation. For example, the method for temperature-dependent frequency compensation includes determining a first frequency compensation as a first function of temperature using one or more crystal oscillators, processing information associated with the first frequency compensation as the first function of temperature, and determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature. The one or more crystal oscillators do not include the crystal oscillator, and the first frequency compensation as the first function of temperature is different from the second frequency compensation as the second function of temperature.
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Citations
17 Claims
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1. A method for temperature-dependent frequency compensation, the method comprising:
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determining a first frequency compensation as a first function of temperature using one or more crystal oscillators; processing information associated with the first frequency compensation as the first function of temperature; and determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature; wherein; the one or more crystal oscillators do not include the crystal oscillator; and the first frequency compensation as the first function of temperature is different from the second frequency compensation as the second function of temperature; wherein the determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature includes; measuring an actual frequency of the crystal oscillator at a selected temperature; determining a third frequency compensation for the crystal oscillator at the selected temperature based at least in part on the measured actual frequency; processing information associated with the third frequency compensation for the crystal oscillator at the selected temperature; and determining the second frequency compensation for the crystal oscillator as the second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature and the third frequency compensation for the crystal oscillator at the selected temperature; wherein the determining a third frequency compensation for the crystal oscillator at the selected temperature based at least in part on the measured actual frequency includes determining the third frequency compensation equal to a desired frequency of the crystal oscillator at the selected temperature minus the actual frequency of the crystal oscillator at the selected temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for temperature-dependent frequency compensation, the method comprising:
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determining a first frequency compensation as a first function of temperature using one or more crystal oscillators; processing information associated with the first frequency compensation as the first function of temperature; and determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature; wherein; the one or more crystal oscillators do not include the crystal oscillator; and the first frequency compensation as the first function of temperature is different from the second frequency compensation as the second function of temperature; wherein the determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature includes; measuring an actual frequency of the crystal oscillator at a selected temperature; determining a third frequency compensation for the crystal oscillator at the selected temperature based at least in part on the measured actual frequency; processing information associated with the third frequency compensation for the crystal oscillator at the selected temperature; and determining the second frequency compensation for the crystal oscillator as the second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature and the third frequency compensation for the crystal oscillator at the selected temperature; wherein the determining the second frequency compensation for the crystal oscillator as the second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature and the third frequency compensation for the crystal oscillator at the selected temperature includes; determining a frequency compensation value at the selected temperature based at least in part on the first frequency compensation as the first function of temperature; calculating a frequency offset equal to the frequency compensation value minus the third frequency compensation for the crystal oscillator at the selected temperature; and determining the second frequency compensation for the crystal oscillator as the second function of temperature equal to the first frequency compensation as the first function of temperature minus the frequency offset.
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12. A method for temperature-dependent frequency compensation, the method comprising:
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determining a first frequency compensation as a first function of temperature using one or more crystal oscillators; processing information associated with the first frequency compensation as the first function of temperature; and determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature; wherein; the first function of temperature is configured to provide multiple first compensation values for the first frequency compensation in response to multiple first temperatures respectively; and the second function of temperature is configured to provide multiple second compensation values for the second frequency compensation in response to multiple second temperatures respectively; wherein the determining a second frequency compensation for a crystal oscillator as a second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature includes; measuring an actual frequency of the crystal oscillator at a selected temperature; determining a third frequency compensation for the crystal oscillator at the selected temperature based at least in part on the measured actual frequency; processing information associated with the third frequency compensation for the crystal oscillator at the selected temperature; and determining the second frequency compensation for the crystal oscillator as the second function of temperature based on at least information associated with the first frequency compensation as the first function of temperature and the third frequency compensation for the crystal oscillator at the selected temperature; wherein the determining a third frequency compensation for the crystal oscillator at the selected temperature based at least in part on the measured actual frequency includes determining the third frequency compensation equal to a desired frequency of the crystal oscillator at the selected temperature minus the actual frequency of the crystal oscillator at the selected temperature. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification