Rotation velocity sensor and method for sensing rotation velocity

A rotation velocity sensor, comprising:

• a driving unit, configured to operably generate a vibration driving signal in a predetermined frequency, and generate a reference signal in a same phase of the vibration driving signal;
• a proof mass, configured to be operably driven by the vibration driving signal to vibrate in a first direction;
• a rotation sensing element, configured to operably sense a vibration of the proof mass to generate a charge signal which corresponds to a portion of the vibration of the proof mass in a second direction orthogonal to the first direction;
• a compensating unit, configured to operably generate a compensation signal according to the reference signal;
• and
• a rotation sensing unit, configured to operably convert the charge signal to a voltage signal or a current signal, and compensate the voltage signal or the current signal according to the compensation signal to cancel a noise in the second direction so as to obtain a compensated rotation sensing signal.