In a computer, a test script is received that includes a first set of commands to be provided to an Internet protocol telephone. One comparator detects when duty cycle is high and the other comparator detects when the duty cycle is low. A suspension actuator part attached to the working platform, contains a soft magnetic core with poles facing the surface of a soft magnetic element on the support structure along the path and a winding for application of a current to generate a magnetic field that runs through the core v the poles and returns via the soft magnetic element. Note that the response may also include a hint that facilitates generating subsequent requests to perform the operation. Innovative circuit implementation consisting of an additional Top Up Buffer Amplifier stage ensures a fast recharge of VREF output, thus allowing shorter ON times and respectively even better power efficiency.