Patent ID: 8618816

Claim:
A measuring device with at least one micro-electromechanical capacitive sensor ( 9 a , 9 b ) comprising electrodes that move toward and away from each other to measure a mechanical deflection of a test mass ( 2 ), with a charge integrator comprising an operational amplifier ( 11 ) that has at least one amplifier input ( 13 a , 13 b ) connected to the capacitive sensor ( 9 a , 9 b ) and at least one amplifier output ( 15 a , 15 b ) that is fed back via at least one integration capacitor ( 16 a , 16 b ) to the amplifier input ( 13 a , 13 b ), wherein: the at least one amplifier input ( 13 a , 13 b ) is connected via an electrical resistor ( 17 a , 17 b ) to a terminal ( 18 ) for an electrical common-mode reference potential which is connected with a reference voltage source ( 42 ); the operational amplifier ( 11 ) comprises at least one auxiliary input ( 20 a , 20 b ) in addition to the at least one amplifier input ( 13 a , 13 b ); and the amplifier output ( 15 a , 15 b ) is connected via a low pass ( 22 ) to the at least one auxiliary input ( 20 a , 20 b ).