TEMPERATURE-COMPENSATED OSCILLATOR AND METHOD OF MANUFACTURING TEMPERATURE-COMPENSATED OSCILLATOR

摘要

PROBLEM TO BE SOLVED: To operatively switch between a plurality of temperature-frequency characteristics.;SOLUTION: A temperature-compensated oscillator 100 includes: a temperature detection section 3 for detecting an ambient temperature; an oscillation circuit 1 including a quartz vibrator 11; a variable impedance element 2 disposed in the oscillation circuit 1 and varying an impedance in accordance with a control voltage to vary an oscillation frequency of the oscillation circuit; an EEPROM 4 for storing constants of a nonlinear function representing a relationship between the ambient temperature and the control voltage in association with a plurality of temperature-frequency characteristics of the temperature-compensated oscillator 100; a selection section 63 for selecting one from the plurality of temperature-frequency characteristics; and a control voltage output section 64 for outputting the control voltage corresponding to the ambient temperature detected by the temperature detection section 3 on the basis of the nonlinear function with the constants stored in the EEPROM 4 in association with the temperature-frequency characteristic selected by the selection section.;COPYRIGHT: (C)2014,JPO&INPIT