A circuit for driving a capacitive load is provided. The circuit includes
a differential signal sensor and a differential amplifier. The
differential amplifier is arranged to drive the capacitive load. Further,
the differential amplifier is arranged to receive an output voltage at
one input, and to receive a reference voltage at another input. The
output voltage is provided at the output of the differential amplifier.
Also, the differential amplifier is arranged to receive a bias current.
The differential signal sensor is arranged to determine whether the
difference between the output voltage and the reference voltage is within
a voltage window. If the difference between the output voltage and the
reference voltage is inside of the voltage window, the bias current is
provided at its normal value. However, if the difference between the
output voltage and the reference voltage is outside of the voltage
window, the bias current is increased so that the bias current linearly
increases with respect to time.