TEMPERATURE COMPENSATION FOR AN OSCILLATOR CRYSTAL
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United States of America Patent
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Jan 25, 2017
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Jan 31, 2010
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Abstract
An electronic device is equipped with an oscillator interface to be coupled to an oscillator crystal of an oscillator element. The electronic device includes an oscillator circuit which is coupled to the oscillator interface and generates an oscillator signal. The electronic device is further provided with a temperature measurement interface to be coupled to a temperature sensor of the oscillator element so as to receive the temperature signal. For accomplishing temperature compensation, the electronic device is provided with a measurement controller coupled to the measurement: interface and configured to measure a first value of the temperature signal at a first point of time and a. second value of the temperature signal at a second point of time. Afrequency drift estimator is provided so as to estimate a frequency drift of the oscillator signal on the basis of the first value of the temperature signal and a second value of the temperature signal. By means of a compensation logic, a frequency compensation signal for the oscillator circuit is generated on the basis of the estimated frequency drift.
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