Patent ID: 7372649

Claim:
An apparatus for use in applying write signals for driving a write head to effect writing information to a memory device, the write signals including a first write signal and a second write signal, the apparatus comprising: (a) a current directing circuit receiving said write signals, said current directing circuit directing a write current to establish a write voltage between a first locus and a second locus across said write head that results in voltage at said first locus changing toward a first polarity in response to said first write signal and voltage at said second locus changing toward a second polarity substantially opposite the first polarity in response to said first write signal; (b) a first boost system coupled with said current directing circuit and said first locus, said first boost system boosting voltage at said first locus toward said first polarity so that a resultant current through said write head substantially overshoots a resultant current through said write head when boosting of said voltage at said first locus is terminated; (c) a second boost system coupled with said current directing circuit and said second locus, said second boost system boosting voltage at said second locus toward said second polarity so that a resultant current through said write head substantially overshoots a resultant current through said write head when boosting of said voltage at said second locus is terminated; and wherein said first boost system is responsive to a first boost system control unit, wherein said second boost system is responsive to a second boost system control unit, and wherein said first boost system control unit operates independently of said second boost system control unit.