Angular velocity sensor

An angular rate sensor for a vibration body comprising means for detecting a level of vibrations of a vibration body, detecting means for detecting a Coriolis' force produced in proportion to an angular rate, a current amplifier for amplifying an output signal of said means of detecting a level of vibrations, a full-wave rectifier circuit for producing a D.C. voltage by rectifying an output signal of a band-pass filter, wherein an output signal of said current amplifier is input, a charge amplifier for inputting and amplifying a signal detected by said detecting means for detecting a Coriolis' force, a synchronous detection circuit for detecting an output signal of a band-pass filter, wherein an output signal of said charge amplifier is input, a sensor output terminal for outputting an output signal of a low-pass filter, wherein an output signal of said synchronous detection circuit is input, a determination circuit for inputting the output signal of said full-wave rectifier circuit and an output signal of said charge amplifier, and for making a determination of abnormality, and an output clamping circuit having a transistor connected to a sensor output terminal, said output clamping circuit activated by an output signal of said determination circuit, if said determination circuit makes a determination of abnormality, said transistor is forward-biased and said output clamping circuit clamps the output signal of said sensor output terminal at a level close to a power supply voltage.