the case with conventional chopper amplifiers during a measuring cycle four or eight measurements are carried out in each polarity of the multiplexer wherein only the last value is used for the digital calculation of the offset compensated measurement value which completely avoids transient phenomena an updated and fully offset compensated measuring value is available after the usual conversion time during continuous measurements because the last given measured value with the other sign can be used for the digital calculation the digital circuit 9 is also connected to a digital interface 10 for outputting the measurement signal the measuring circuit 1 also makes it possible to detect an interruption or breakage of the connecting lines connected to the two signal inputs rshh and rshl for this purpose the measuring circuit 1 contains two switchable current sources 15 1 and 15 2 that are connected to the two signal inputs rshh and rshl and able to deliver a measuring current it can be determined whether the connecting lines are interrupted or defective by measuring the differential voltage at the two signal inputs rshh and rshl analogously the connecting lines on the inputs vbat etr and ets can be checked for breaks by connecting the internal current source 18 in addition the measuring circuit 1 allows an analog offset of the input signal to approximately half the supply voltage thus input voltages with positive and negative values of up to u2212 0 7 v can be measured with equal accuracy for this purpose the measuring circuit 1 contains a trimming circuit 16 and 17 the output of which is connected to the.