Time-to-digital converter, circuit device, physical quantity measurement apparatus, electronic apparatus, and vehicle

A time-to-digital converter comprising:

• a first clock signal generation circuit configured to receive a first reference clock signal having a first clock frequency and generate a first cycle signal having a voltage level that monotonously increases or decreases in a cycle corresponding to the first clock frequency, and further generate a first clock signal based on a first signal and the first cycle signal;
• a second clock signal generation circuit configured to receive a second reference clock signal having a second clock frequency different from the first clock frequency and generate a second cycle signal having a voltage level that monotonously increases or decreases in a cycle corresponding to the second clock frequency, and further generate a second clock signal based on a second signal and the second cycle signal;
• and
• a processing circuit configured to convert a time difference between a transition timing of the first signal and a transition timing of the second signal into a digital value based on the first and second clock signals.