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DRIVING CIRCUIT AND METHOD FOR A MEMS GYROSCOPE AND CORRESPONDING MEMS GYROSCOPE
DRIVING CIRCUIT AND METHOD FOR A MEMS GYROSCOPE AND CORRESPONDING MEMS GYROSCOPE
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机译：MEMS陀螺仪的驱动电路和方法以及相应的MEMS陀螺仪
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摘要
A driving circuit (14) for a MEMS gyroscope (32) operating based on the Coriolis effect supplies drive signals (D 1 , D 2 ) to a mobile mass (2) of the MEMS gyroscope (32) to cause a driving movement thereof at an oscillation frequency (f d ) and envisages: an input stage (15), which receives at least one electrical quantity representing the driving movement of the mobile mass (2) and generates a drive-detection signal (V SD ) based on said electrical quantity; a measurement stage (22), which measures an oscillation amplitude (Ao) of the driving movement as a function of the drive-detection signal (V SD ); and a control stage (19, 26), which generates the drive signals (D 1 , D 2 ) based on a feedback control of the oscillation amplitude. In particular, the measurement stage (22) performs a measurement of a time interval (”t) during which the drive-detection signal (V SD ) has a given relation with an amplitude threshold (A th ), and measures the oscillation amplitude (A 0 ) as a function of this time interval (”t).
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