Patent ID: 7280300

Claim:
A write driver circuit for a magnetic storage medium that communicates with a write head having first and second nodes, comprising: a first driver circuit having a first input, a first output that communicates with the first node, and a first feedback path between said first input and said first output; a second driver circuit having a second input, a second output that communicates with the second node, and a second feedback path between said second input and said second output; a first write current circuit that selectively drives current through the write head in a first direction; a second write current circuit that selectively drives current through the write head in a second direction; and a first boost circuit that decreases a first transition period between current flowing in said first direction and current flowing in said second direction, wherein said first feedback path includes: a first resistance having one end that communicates with said output of said first driver circuit; and a first transistor having a base that is connected to an opposite end of said first resistance and a collector that is connected to said input of said first driver circuit.