Phase locked loop and sensing device

A sensing device comprising:

• a phase locked loop;
• and
• a physical quantity calculator, wherein
• the phase locked loop comprises
• an oscillator that varies a frequency according to a control signal,
• a resonance element that resonates at a predetermined resonance frequency and output a signal obtained by shifting a phase of an output signal of the oscillator by 90 degrees at the resonance frequency,
• a phase detector that detects a phase error between an output signal of the resonance element and an output signal of the oscillator,
• a feedback controller that controls a frequency of an output signal of the oscillator by proportional control and integral control according to the phase error,
• and
• a control signal corrector that corrects the control signal by adding a correction term corresponding to environment information to an output signal of the feedback controller, and
• the physical quantity calculator calculates a physical quantity on the basis of at least one of the output signal of the resonance element, the output signal of the oscillator, or the control signal.