Method of compensating for the frequency error of system clock in mobile communication terminal with digitally controlled crystal oscillator and mobile communication terminal thereof
First Claim
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1. A mobile communication terminal, comprising:
- A digitally controlled crystal oscillator for generating a system clock;
A sensor for detecting an ambient temperature;
A frequency compensation value provider for providing a frequency compensation value for compensating for a frequency error in the system clock generated in the digitally controlled crystal oscillator on the basis of the ambient temperature detected from the sensor; and
A controller for transmitting a control signal for compensating for a frequency error of a system clock to the digitally controlled crystal oscillator on the basis of the frequency compensation value provided from the frequency compensation value provider, and for controlling the frequency of the system clock generated from the digitally controlled crystal oscillator.
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Abstract
A method of compensating a frequency error of a system clock, comprising: detecting an ambient temperature, providing the frequency compensation value for compensating the frequency error of the system clock which is generated in a digitally controlled crystal oscillator on the basis of the detected ambient temperature, and controlling the frequency error of the system clock generated in the digitally controlled crystal oscillator to compensate for the frequency error in accordance with the frequency compensation value.
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Citations
12 Claims
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1. A mobile communication terminal, comprising:
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A digitally controlled crystal oscillator for generating a system clock;
A sensor for detecting an ambient temperature;
A frequency compensation value provider for providing a frequency compensation value for compensating for a frequency error in the system clock generated in the digitally controlled crystal oscillator on the basis of the ambient temperature detected from the sensor; and
A controller for transmitting a control signal for compensating for a frequency error of a system clock to the digitally controlled crystal oscillator on the basis of the frequency compensation value provided from the frequency compensation value provider, and for controlling the frequency of the system clock generated from the digitally controlled crystal oscillator. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of compensating a frequency error of a system clock, comprising:
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Detecting an ambient temperature;
Providing the frequency compensation value for compensating the frequency error of the system clock which is generated in a digitally controlled crystal oscillator on the basis of the detected ambient temperature; and
Controlling the frequency error of the system clock generated in the digitally controlled crystal oscillator to compensate for the frequency error in accordance with the frequency compensation value. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification