Patent ID: 8353210

Claim:
A system for measuring a physical value having multiple capacitive measuring sensors ( 20 ) and an inverting measuring signal amplifier ( 17 ; 17 . 1 , 17 . 2 ) being connected downstream from each measuring sensor ( 20 ), one output of a measuring sensor ( 20 ) being connected to an inverting input of the inverting measuring signal amplifier ( 17 ; 17 . 1 , 17 . 2 ) connected downstream from the measuring sensor ( 20 ) in each case, characterized in that a reference sensor ( 21 ) is associated with each measuring sensor ( 20 ), whereby an inverting reference signal amplifier ( 22 ) is connected downstream of said reference sensor 21 , one output of the reference sensor ( 21 ) being connected to an inverting input of the inverting reference signal amplifier ( 22 ), a signal generator ( 26 ) is associated with each measuring sensor ( 20 ) and reference sensor ( 21 ), and means for subtracting the output signal of the inverting reference signal amplifier ( 22 ) from the output signal of the inverting measuring signal amplifier ( 17 ; 17 . 1 , 17 . 2 ) in order to output a differential signal (V out 1 ) as output signal.