Magnetic write circuit with charge pumping capacitors
AssigneeAgere Systems Inc.
InventorJong K. Kim
Life of this patent
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Abstract
A disk drive system including a write circuit for controlling current through a magnetic write head includes an H-switch circuit and a charge-pumping circuit. The H-switch circuit controls direction of current through the magnetic write head. The charge-pumping circuit is connected to the H-switch circuit for storing energy during a first state of the H-switch circuit, and delivering energy upon switching from the first state to a second state of the H-switch circuit to accelerate a change in direction of current through the write head.
Claims16
A disk drive system including a write circuit for controlling current through a magnetic write head, the write circuit comprising:
- an H-switch circuit for controlling direction of current through the write head;
- and
- a charge-pumping circuit connected to the H-switch circuit for storing energy during a first state of the H-switch circuit, and delivering energy upon switching from the first state to a second state of the H-switch circuit to accelerate a change in direction of current through the write head.
A write circuit for controlling current through a magnetic write head, the write circuit comprising:
- a switch network for controlling direction of current through the write head;
- and
- means for storing energy during a first state of the switch network, and delivering energy upon switching from the first state to a second state of the switch network to accelerate a change in direction of current through the write head.
Dependencies are inferred from the claim text.