Circuit Device And Oscillator

An oscillator, comprising:

• a resonator;
• and
• a circuit device, wherein
• the circuit device includes
• an oscillation circuit configured to oscillate the resonator,
• a temperature compensation circuit configured to output a temperature compensation voltage for temperature compensating an oscillation frequency of the oscillation circuit, based on a temperature detection result of a temperature sensor, and
• a frequency control circuit configured to output a frequency control voltage for the oscillation frequency,
• the oscillation circuit includes
• a first variable capacitance circuit whose capacitance change characteristic with respect to a capacitance control voltage is a positive characteristic, and
• a second variable capacitance circuit whose capacitance change characteristic with respect to the capacitance control voltage is a negative characteristic,
• the temperature compensation circuit supplies the temperature compensation voltage as the capacitance control voltage to the first variable capacitance circuit, and
• the frequency control circuit supplies the frequency control voltage as the capacitance control voltage to the second variable capacitance circuit.