METHOD AND DEVICE FOR ADJUSTING TEMPERATURE COMPENSATING CRYSTAL OSCILLATOR

PROBLEM TO BE SOLVED: To compensate temperature of a temperature compensating crystal oscillator at low costs and high accuracy. SOLUTION: The device is provided with an input means 12 for reading the characteristic data showing a frequency deviation-temperature characteristic of a single crystal oscillator, a temperature detecting means 14 for detecting a temperature of the temperature compensating crystal oscillator when the frequency is adjusted, a first calculation means 16 for working out a function showing the frequency deviation- temperature characteristic of the single crystal oscillator, a frequency adjusting means 22 for adjusting a control voltage to be applied to a variable capacitance element so that the frequency deviation is zero at a room temperature, a second calculation means 18 for working out the frequency deviation-temperature characteristic of the oscillator at the time of the above-mentioned adjustment based on the surrounding temperature of the crystal oscillator when the frequency is adjusted, and additionally for working out the control voltage data of the variable capacitance element so that the frequency deviation regarding the frequency deviation-temperature characteristic is zero, and a data writing means 20 for storing the control voltage data worked out by the second calculating means in a memory.