Patent ID: 8680933

Claim:
A temperature-compensated oscillator comprising: a temperature sensor adapted to output a detected-temperature voltage corresponding to temperature; a temperature compensation circuit adapted to output a temperature compensation voltage based on the detected-temperature voltage; a voltage-controlled oscillation circuit adapted to output an oscillation signal on which temperature compensation is performed based on the temperature compensation voltage; an output circuit adapted to output an ON/OFF signal based on a magnitude relation between an amplitude of a voltage variation in the detected-temperature voltage in a desired period and a reference voltage; a switch circuit adapted to perform ON/OFF control on power supply to the temperature compensation circuit in response to the ON/OFF signal; and a sample-and-hold circuit controlled to be switched between a state of outputting the temperature compensation voltage to the voltage-controlled oscillation circuit while holding the temperature compensation voltage output by the temperature compensation circuit, and a state of outputting the temperature compensation voltage held to the voltage-controlled oscillation circuit while cutting the connection to the temperature compensation circuit in response to the ON/OFF signal.