As the driving method of the frictional fine positioning system based on slow expansion and quick restoration of piezoelectric actuator, we demonstrate it is reasonable to use, rather than a high-power high-voltage amplifier, the combination of a dc source or an amplifier with a driving capacity of high-voltage but small-current and a MOSFET discharging switch to the ground. We also demonstrate a waveform redressing circuit without need of dedicated power source, which is useful when the restoration takes too much time due to a driver with insufficient performance or due to the cable inductance between the driver and the actuator.