Circuit device, oscillator, electronic apparatus and moving object

Abstract

A circuit device includes a phase comparison circuit that performs phase comparison between a reference clock signal and a feedback clock signal, a control voltage generation circuit that generates a control voltage, a voltage controlled oscillation circuit that generates a clock signal, a dividing circuit that divides the clock signal and outputs the feedback clock signal, a processing circuit that sets a division ratio of the dividing circuit, a first register in which slope information of a waveform signal for spreading the frequency of the clock signal is set, and a second register in which amplitude information of the waveform signal is set. The processing circuit generates a waveform signal value based on the slope information and the amplitude information set in the first and second registers, and outputs division ratio data based on the waveform signal value and the division ratio setting value to the dividing circuit.