System and method for write current drivers for inductive heads used in
mass storage drives. A preferred embodiment comprises a write current
circuit coupled to an inductive write head, a MOS transistor boost
circuit and a matching circuit, both coupled to the write current
circuit. The write current circuit provides a first current to the
inductive write head, while the MOS transistor boost circuit provides a
second current for a specified duration to the inductive write head when
the MOS transistor boost circuit receives a control signal. The matching
circuit selectively decouples a resistive element from the inductive
write head when it receives the control signal. The MOS transistor boost
circuit can accelerate the transition in a switching of the polarity of
the write current and the matching circuit helps to reduce ringing
without negatively affecting the speed of the polarity switching by
decoupling when the second current is provided.