A piezoelectric circuit comprising: a piezoelectric actuator for generating a sensing signal in response to a force application, and for generating a haptic response in response to a haptic voltage signal; a driver circuit for generating the haptic voltage signal in response to a wake-up signal; a wakeup circuit that does not draw power when force is not applied to the piezoelectric actuator comprising: a capacitor coupled to the piezoelectric actuator and the driver circuit; a transistor including a first gate terminal capacitively coupled via the capacitor to the piezoelectric actuator for receiving the sensing signal, a second drain or source terminal (22 or 23) connected to a voltage source (Vc), and a third source or drain terminal (22 or 23) connected to ground, wherein the transistor conducts when the sensing signal is valid; and an output connected to the second drain or source terminal (22 or 23) for providing the wake-up signal to the driver circuit when the transistor conducts; and a feedback system including a switch providing a path to ground or the voltage source (Vc) in between the capacitor and the first gate terminal to disable the transistor, wherein the switch is closed after the wake-up signal has been detected protecting the transistor from the haptic voltage signal or any voltage signal high enough to damage the transistor. a piezoelectric actuator for generating a sensing signal in response to a force application, and for generating a haptic response in response to a haptic voltage signal; a driver circuit for generating the haptic voltage signal in response to a wake-up signal; a wakeup circuit that does not draw power when force is not applied to the piezoelectric actuator comprising: a capacitor coupled to the piezoelectric actuator and the driver circuit; a transistor including a first gate terminal capacitively coupled via the capacitor to the piezoelectric actuator for receiving the sensing signal, a second drain or source terminal (22 or 23) connected to a voltage source (Vc), and a third source or drain terminal (22 or 23) connected to ground, wherein the transistor conducts when the sensing signal is valid; and an output connected to the second drain or source terminal (22 or 23) for providing the wake-up signal to the driver circuit when the transistor conducts; and a capacitor coupled to the piezoelectric actuator and the driver circuit; a transistor including a first gate terminal capacitively coupled via the capacitor to the piezoelectric actuator for receiving the sensing signal, a second drain or source terminal (22 or 23) connected to a voltage source (Vc), and a third source or drain terminal (22 or 23) connected to ground, wherein the transistor conducts when the sensing signal is valid; and an output connected to the second drain or source terminal (22 or 23) for providing the wake-up signal to the driver circuit when the transistor conducts; and a feedback system including a switch providing a path to ground or the voltage source (Vc) in between the capacitor and the first gate terminal to disable the transistor, wherein the switch is closed after the wake-up signal has been detected protecting the transistor from the haptic voltage signal or any voltage signal high enough to damage the transistor.