Circuit device and oscillator

Abstract

A circuit device that operates by being supplied with a power supply voltage includes an oscillation circuit configured to oscillate a resonator; a temperature sensor configured to output a temperature detection voltage; an offset adjustment circuit configured to output an offset adjustment voltage of the temperature detection voltage; a correction voltage output circuit configured to receive inputs of the power supply voltage and the offset adjustment voltage and output a correction voltage that changes in accordance with the power supply voltage and the offset adjustment voltage; a correction circuit configured to receive inputs of the temperature detection voltage and the correction voltage and output a temperature detection voltage corrected with the correction voltage; and a temperature compensation circuit configured to perform temperature compensation of an oscillation frequency of the oscillation circuit based on the corrected temperature detection voltage.

Dependencies are inferred from the claim text.