Patent ID: 8117913

Claim:
An angular velocity sensor comprising: a sensing element including: a plurality of arms; a driver unit formed on one of the arms for driving the arm to vibrate; and a first sensor unit and a second sensor unit formed on the arms for sensing distortion of the arms; a driver circuit unit connected to the driver unit for driving the driver unit; and a detector circuit unit connected to the first sensor unit and the second sensor unit for detecting an angular velocity, wherein the driver circuit unit supplies two driving signals to the driver unit, and wherein the detector circuit unit has functions of: outputting a first differential signal according to two sensor signals output from the first sensor unit; outputting a second differential signal according to two sensor signals output from the second sensor unit; outputting a first additional signal according to the two sensor signals output from the first sensor unit; outputting a second additional signal according to the two sensor signals output from the second sensor unit; and detecting the angular velocity from an additional signal obtained based on the first differential signal and the second differential signal, and a differential signal obtained based on the first additional signal and the second additional signal.