| 摘要 |
An angular velocity sensor driving circuit includes a driving part for a 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, a voltage amplifier, a level judging circuit and switching means. The gain of the voltage amplifier or the gain of a variable gain amplifier is varied by a switching circuit which is controlled by the output signal of a level judging circuit which compares the output signal of the rectifying circuit and a reference voltage. By using the switching circuit rapid start up of the angular velocity sensor can be achieved.
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