Oscillator characteristic automatic compensation device, characteristic automatic compensation method, characteristic automatic compensation program, and positioning signal receiver

摘要

In an oscillator having a certain characteristic between the physical quantity and the drift value of the oscillation frequency, the change in the characteristic is adaptively corrected, and the oscillation frequency drift value can always be estimated. The reference oscillator 17 that outputs an oscillation signal whose oscillation frequency depends on temperature, the TCO 16 that detects the temperature of the reference oscillator 17, and the drift value of the oscillation frequency of the reference oscillator 17 while changing the temperature are measured and detected by the TCO 16. Characteristic determining means for predetermining the coefficient of the approximate expression representing the temperature frequency characteristic between the temperature and the drift value of the oscillation frequency of the reference oscillator 17; a memory 13 for storing the coefficient of the approximate expression determined by the characteristic determining means; and the TCO 16 The characteristic deciding means uses the drift value estimating means for estimating the drift value of the oscillation frequency of the reference oscillator 17 based on the temperature detected by the above and the actual drift value of the oscillation frequency of the reference oscillator 17 and the temperature at that time detected by the TCO 16. Characteristic updating means for updating the coefficient of the determined approximate expression.