Patent ID: 7997135

Claim:
An angular velocity sensor comprising: a detecting element for angular velocity detection, wherein the detecting element includes a drive electrode section for inputting a drive signal for driving the detecting element, a monitor electrode section detecting the drive status of the detecting element and outputting a monitor signal, and a sensing electrode section outputting a sensing signal, which is generated due to an angular velocity given to the detecting element, the drive electrode section, the monitor electrode section, and the sensing electrode section each include a lower electrode formed on a substrate, a piezoelectric film formed of a piezoelectric material on the lower electrode, and an upper electrode formed on the piezoelectric film, and the capacitance value between the upper and lower electrodes of the monitor electrode section is set to be equal to the capacitance value between the upper and lower electrodes of the sensing electrode section, and the resistance value between both end portions of the monitor electrode section is set to be equal to the resistance value between both end portions of the sensing electrode section.