Abstract: An output voltage is stabilized at a predetermined target voltage by using a charge pump circuit. A first voltage divider that is arranged between an output line to which the output voltage is applied and a feedback line and that generates a first division voltage commensurate with the output voltage and a second voltage divider arranged between the feedback line and the ground and that generates a second division voltage commensurate with the output voltage are provided to generate on the feedback line, as a feedback voltage, a voltage lower than the output voltage by the first division voltage. The second voltage divider includes an N-type particular transistor whose gate receives a reference voltage and whose drain is connected to the feedback line.

Abstract: A vibration gyro having a substantially H-shaped vibrator, driving piezo-electric elements, detecting piezo-electric elements which detects Corioli's force generated when an angular velocity is applied to said vibration gyro during the vibration by the driving elements, and a supporting member supporting the vibrator, characterized in that the detecting elements are formed of a torsional piezo-electric material.