Patent ID: 7242544

Claim:
An apparatus for use in applying write signals for driving a write head to effect writing information to a memory device; said write signals including a first write signal and a second write signal; the apparatus comprising: (a) a current directing circuit; said current directing circuit receiving said write signals; said current directing circuit directing a write current to establish a write voltage between a first write locus and a second write locus across said write head in a first excursion toward a first polarity in response to said first write signal and directing said write current to establish said write voltage across said write head in a second excursion toward a second polarity substantially opposite said first polarity in response to said second write signal; said first write locus being coupled with a supply locus via an adjacent first impedance unit and a first switching unit; said second write locus being coupled with said supply locus via an adjacent second impedance unit and a second switching unit; said first switching unit being controlled at a first control locus by said first write signal; said second switching unit being controlled at a second control locus by said second write signal; (b) a first boost system coupled with said first control locus and said second control locus; said first boost system boosting said write voltage toward said first polarity during said first excursion; and (c) a second boost system coupled with said first control locus and said second control locus; said second boost system boosting said write voltage toward said second polarity during said second excursion.