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AN INTERFACE CIRCUIT FOR A CAPACITIVE ACCELEROMETER SENSOR
AN INTERFACE CIRCUIT FOR A CAPACITIVE ACCELEROMETER SENSOR
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机译:电容式加速度计传感器的接口电路
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摘要
The present invention relates to an interface circuit (5) for a capacitive accelerometer sensor (3) for measuring an acceleration value sensed by the sensor (3). The interface circuit (5) comprises a plurality of electrical switches (S1 - S7) and three programmable capacitors (Cf, Cref, Cp). Two of the programmable capacitors (Cf, Cref) are arranged to implement gain trimming of the interface circuit (5), while one of the programmable capacitors (Cp) is arranged to implement acceleration range selection.
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