Device for processing signals from a pressure-sensing touch panel

A device (42) is provided for processing signals (10) from a projected capacitance touch panel (43), the touch panel (43) including a layer of piezoelectric material (9) disposed between a plurality of first electrodes (7, 27) and at least one second electrode (8). The device is configured, in response to receiving input signals (10) from a given first electrode (7, 27), to generate a pressure signal (15a, 15b) indicative of a pressure applied to the touch panel (43) proximate to the given first electrode (7, 27) and a capacitance signal (54a, 54b) indicative of a capacitance of the given first electrode (7, 27). The device (42) includes an amplifier (52) configured to generate an amplified signal (14a, 14b) based on the input signals (10). The device (42) also includes an analog-to-digital converter (50a, 50b) configured to be synchronised (53) with the capacitance signal (54a, 54b), and to generate the pressure signal (15a, 15b) by sampling the amplified signal (14a, 14b) at times corresponding to the amplitude of the capacitance signal (54a, 54b) being substantially equal to a ground, common mode or minimum value.