Patent ID: 6959584

Claim:
An angular velocity sensor comprising: a sensor element including a vibrating part and a detector part for detecting an angular velocity; a drive unit including a driver circuit and a monitor circuit, wherein said driver circuit supplies a driving signal to the vibrating part of said sensor element and wherein said monitor circuit receives a monitor signal outputted from said sensor element; a detection unit including a pair of charging amplifiers or current amplifiers, a differential amplifier and a synchronous demodulator, wherein said pair of charging amplifiers or current amplifiers receive outputs from the detector part of said sensor element, said differential amplifier amplifies a difference in outputs from said pair of charging amplifiers or current amplifiers and wherein said synchronous demodulator detects an output from said differential amplifier in synchronous with the driving signal from said drive unit and outputs an angular velocity signal; and an adjusting unit for adjusting a signal from said detector part by coupling a signal synchronized with said driving signal to a circuit, said circuit having an output coupled to said synchronous demodulator, wherein said adjusting unit comprises an adjustor for varying said signal synchronized with said driving signal and an injector for injecting an output signal from said adjustor to a circuit, said circuit having an output coupled to said synchronous demodulator.