Patent ID: 7225094

Claim:
An electronic circuit for detecting measured quantities, including: at least one sensor unit ( 110 ) for generating an analog measurement signal, which represents a measured quantity detected by the sensor unit ( 110 ); a signal detecting unit ( 120 ) with a first analog/digital converter ( 121 ) for digitizing the analog measurement signal; a voltage supply unit ( 130 ) that has a first voltage source ( 132 ) for producing a first supply voltage (VS 1 ) with an imprecision x 1 for the sensor unit ( 110 ) and has a second voltage source ( 134 ) for producing a second supply voltage (VS 2 ) with an imprecision x 2 for the signal detecting unit ( 120 ), the imprecisions x 1 , x 2 being transmitted to the measurement signal, wherein the signal detecting unit ( 120 ) has a correction unit ( 127 ) that compensates for the effects of the imprecisions x 1 and/or x 2 on the digitized measurement signal in response to a digitized voltage signal (U) representing the imprecision x 1 of the first supply voltage, and emits a compensated digitized measurement signal (M) resulting from the compensation, and a second signal detecting unit ( 120 ′) that is operated with the first supply voltage (VS 1 ) and includes a second analog/digital converter ( 122 ′) that digitizes the second supply voltage (VS 2 ) to generate the voltage signal (U), which represents the imprecision x 1 of the first supply voltage (VS 1 ), the second analog/digital converter ( 122 ′) likewise being operated with the first supply voltage (VS 1 ).