A system and method for configuring non-fully populated switch matrixes by identifying the initial configuration, developing a transition sequence, and executing the transition sequence. A service provider receives, a content description from a content provider. Thus, the shape of a magnetic field distributed can be maintained rectangular even if the width of the upper pole is reduced, which enables an increase in the track density of a recording medium. The output stage is also operative to generate a first and second output signal based on the clock signal and the first and second input signals.