Patent ID: 7417817

Claim:
A write driver circuit for a magnetic storage medium that communicates with a write head having first and second nodes, comprising: a first write driver sub-circuit that has an output that communicates with the first node of the write head and that includes: a first driver circuit with a control input and an output; and a first feedback path that communicates with said control input and said output of said first driver circuit; and a second write driver sub-circuit that has an output that communicates with the second node of the write head and that includes: a second driver circuit with a control input and an output; and a second feedback path that communicates with said control input and said output of said second driver circuit, 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 control input of said first driver circuit, and wherein said second feedback path includes: a second resistance having one end that communicates with said output of said second driver circuit; and a second transistor having a base that is connected to an opposite end of said second resistance and a collector that is connected to said control input of said second driver circuit.