Crystal oscillator ageing compensation method
A crystal oscillator, aging value technology, used in the field of electronics
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[0017] figure 2 As a specific example of a method for compensating crystal oscillator aging, the example includes:
[0018] The real-time clock is used to generate the current time. By making a difference between the current time and the start time of the crystal oscillator, the usage time of the crystal oscillator can be obtained; EEPROM is used to store the monthly (or annual) aging value of the voltage-controlled crystal oscillator under test. ; MCU, according to the current time generated by the real-time clock, obtains the use time of the voltage-controlled crystal oscillator, and obtains the compensation value according to the aging value stored in the EEPROM, and can perform compensation at intervals according to the setting, and send the compensation value to the voltage control Crystal oscillator; the voltage-controlled crystal oscillator is the compensated part, which is used to generate a more accurate output frequency.
[0019] The following explains its working ...
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