Angular velocity sensor driving circuit

摘要

An angular velocity sensor driving circuit of the present invention includes a drive part for the vibrator, a vibration level detector, a coriolis force detector, a first amplifier for amplifying an output signal of the vibration level detector, a rectifying circuit, a variable gain amplifier and a voltage amplifier. The gain of the voltage amplifier or a variable gain amplifier is varied by switching means which is controlled by the output signal of a level judging circuit comparing the output signal of the rectifying circuit and a reference voltage. By using the switching means, very quick start up of the angular velocity sensor can be achieved. And ,also, many problems of the prior art can be solved.