Patent ID: 6946848

Claim:
A calibration configuration, comprising: a first voltage divider having: a variable resistor and a resistor connected in series and defining a terminal therebetween for tapping off a partial voltage between said variable resistor and said resistor; a positive terminal connected to said variable resistor for feeding in a positive supply potential of a supply voltage; and a negative terminal connected to said resistor for feeding in a negative supply potential of the supply voltage; a circuit configuration having: an output terminal for providing a voltage; a further resistor having a value in a fixed relationship with a resistance of said resistor of said first voltage divider; an evaluation device connected to said further resistor and generating a control signal dependent upon a value derived from said further resistor; and a voltage generator connected to said evaluation device and generating said voltage from a multiplicity of possible voltages in a manner dependent on said control signal; a comparator having: a first input connected to said output terminal of said circuit configuration for feeding in said voltage; a second input connected to said terminal for tapping off said partial voltage; and an output terminal for outputting a comparison result of a comparison of said voltage and said partial voltage respectively fed in at said first input and at said second input; and a control logic unit connected downstream of said comparator with respect to an input-to-output direction of said comparator, said control logic unit: having an output terminal coupled to said variable resistor of said first voltage divider; and generating, dependent upon said comparison result, a control signal at said output terminal driving said variable resistor.