Patent ID: 7035028
Filing Date: 2006-04-25
Classification: G11B,H02M

Abstract:
1. A write driver circuit for driving current through a write head in a hard disk system, the driver being adapted to have an improved output dynamic range, the write driver comprising: an output node for connecting with an interconnect to the write head; means for receiving a supply voltage; a current generator connected to the supply voltage receiving means and generating a pulsed current; and a capacitance device with an input node and an output node, the input node being connected to the current generator and the capacitance device output node being connected to the write driver circuit output node, whereby the pulsed current flows through the capacitance device to the write driver circuit output node; wherein the pulsed current is generated for a period of time equal to an overshoot duration and wherein the capacitance device is sized to avoid saturation of the current generator during the time period.