A touch data generator (210a) adapted for use in a touch panel control unit of a touch screen comprising a touch screen panel and a display driving circuit, wherein the touch data generator comprises: an amplifier (AMP) having a positive input terminal receiving an alternating reference voltage, a negative input terminal of a sensor input receives an output terminal that provides an output voltage (Vout) is available, and a resistor-capacitor feedback circuit (Rf, Cf) which biases the amplifier (AMP), wherein the sensor input comprises a sensor capacitance (Csig) having a touch capacitance and a capacitive background noise component (Ch), and the amplifier is adapted to the capacitive background noise component (Ch) from the sensor input to eliminate, while the reference voltage depending on the Beruhrungskapazita t reinforced.