A driver circuit for a display panel, whereby said display panel is driven during a display period for displaying an image, and for touch sensors (Cs), whereby said touch sensors (Cs) are driven during a touch sensor driving period, and whereby said touch sensors (Cs) comprise at least a first and second touch sensor, said driver circuit further comprising: • a touch driving circuitry including an amplifier (PREAMP) to receive one or more touch sensor driving signals (V MOD) during a touch input sensing portion of the touch sensor driving period, receive a DC reference voltage (V REFL) during a noise measurement portion of the touch sensor driving period, and amplify a signal on one or more sensor lines connected to the first and second touch sensors (Cs) based on a touch sensor driving frequency; wherein the touch driving circuitry is configured to: o supply the one or more touch sensor driving signals (V MOD) to the first and second touch sensors (Cs) during the touch input sensing portion; ∘ sense a touch input during the touch input sensing portion; ∘ measure a first electrical noise which is applied to the first and second touch sensors (Cs) through a finger or a conductor during the noise measurement portion while the amplifier (PREAMP) is driven at a first touch sensor driving frequency (SW RP) and is supplied with the DC reference voltage (V REFL); ∘ measure a second electrical noise which is applied to the first and second touch sensors (Cs) through a finger or a conductor during the noise measurement portion while the amplifier is driven at a second touch sensor driving frequency (SW RP), different from the first touch sensor driving frequency (SW RP), and is supplied with the DC reference voltage (V REFL); ∘ compare the first electrical noise to the second electrical noise; and ∘ adjust an operating frequency of the touch driving circuitry based on the comparison, characterized in that the touch driving circuitry includes a multiplexer configured to selectively short together the first and second touch sensors (Cs) during the noise measurement portion. • a touch driving circuitry including an amplifier (PREAMP) to receive one or more touch sensor driving signals (V MOD) during a touch input sensing portion of the touch sensor driving period, receive a DC reference voltage (V REFL) during a noise measurement portion of the touch sensor driving period, and amplify a signal on one or more sensor lines connected to the first and second touch sensors (Cs) based on a touch sensor driving frequency; wherein the touch driving circuitry is configured to: o supply the one or more touch sensor driving signals (V MOD) to the first and second touch sensors (Cs) during the touch input sensing portion; ∘ sense a touch input during the touch input sensing portion; ∘ measure a first electrical noise which is applied to the first and second touch sensors (Cs) through a finger or a conductor during the noise measurement portion while the amplifier (PREAMP) is driven at a first touch sensor driving frequency (SW RP) and is supplied with the DC reference voltage (V REFL); ∘ measure a second electrical noise which is applied to the first and second touch sensors (Cs) through a finger or a conductor during the noise measurement portion while the amplifier is driven at a second touch sensor driving frequency (SW RP), different from the first touch sensor driving frequency (SW RP), and is supplied with the DC reference voltage (V REFL); ∘ compare the first electrical noise to the second electrical noise; and ∘ adjust an operating frequency of the touch driving circuitry based on the comparison, o supply the one or more touch sensor driving signals (V MOD) to the first and second touch sensors (Cs) during the touch input sensing portion; ∘ sense a touch input during the touch input sensing portion; ∘ measure a first electrical noise which is applied to the first and second touch sensors (Cs) through a finger or a conductor during the noise measurement portion while the amplifier (PREAMP) is driven at a first touch sensor driving frequency (SW RP) and is supplied with the DC reference voltage (V REFL); ∘ measure a second electrical noise which is applied to the first and second touch sensors (Cs) through a finger or a conductor during the noise measurement portion while the amplifier is driven at a second touch sensor driving frequency (SW RP), different from the first touch sensor driving frequency (SW RP), and is supplied with the DC reference voltage (V REFL); ∘ compare the first electrical noise to the second electrical noise; and ∘ adjust an operating frequency of the touch driving circuitry based on the comparison,