Patent ID: 6404574
Filing Date: 2002-06-11
Classification: G11B

Abstract:
A writer driver including:first and second head nodes for coupling to a write head; first and second supply nodes; first and second drive transistors each having a collector and an emitter, with the collectors of the first and second drive transistors coupled to the first supply node, the emitter of the first drive transistor coupled to the first head node and the emitter of the second drive transistor coupled to the second head node; a first diode coupled between the emitter of the first drive transistor and the first head node; a second diode coupled between the emitter of the second drive transistor and the second head node; and a control circuit having first and second data inputs for receiving input signals representative of data to be written by the write head, the first and second data inputs being coupled respectively to the first and second drive transistors, the first drive transistor being responsive to input signals at one of the first and second data inputs to supply write current through a write head coupled to first and second head nodes in a first direction and the second drive transistor being responsive to input signals at another of the first and second data inputs to supply write current through the write head coupled to first and second head nodes in a second direction opposite the first direction.