| 摘要 |
PURPOSE: A yaw rate sensor is provided to detect a small change in yaw rate by enlarging cross section between vibration bar and sensing electrodes and altering shape of the vibration bar and the sensing electrodes. CONSTITUTION: A sensor(1) detects the capacitance change caused by the yaw rate from the outside by enlarging cross section between sensing electrodes on both sides and a vibration bar. An amplifier(OP1) amplifies the reference signal from the sensor(1). A differential amplifier(OP2) obtains a difference of the detection signals detected by the two sensing electrodes. A synchronization demodulator(2) divides the phase change of the amplifier(OP1) and the differential amplifier(OP2) to DC(direct current) component and high-frequency component. Another amplifier(OP3) amplifies the DC component while removing the high-frequency component.
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