Patent ID: 6226141
Filing Date: 2001-05-01
Classification: G11B

Abstract:
A hard disk drive for a computer system comprising:a. one or more platters having magnetic media on one or more surfaces;b. a write head associated with at least one of said surfaces having magnetic media;c. an H-bridge circuit capable of driving a current through said write head;d. a damp circuit connected to said write head comprising two transistors, where the base/gate of each transistor is connected to an enable, the emitters/sources are each connected to one side of said write head without a diode in the connection, and the collectors/drains are connected to a voltage source, and wherein said damp circuit has a Vbias voltage above a DC operating voltage of said write head to bias said transistors, ande. a second damp circuit connected to said write head comprising two transistors, where the base/gate of each transistor is connected to an enable having a Vbias, the emitters/sources are each connected to one side of said write head, and the collectors/drains are connected to a voltage source, wherein said second damp circuit enable bias voltage is below said DC operating voltage plus a diode drop.