Patent ID: 8139319

Claim:
A perpendicular magnetic recording write system for magnetizing regions in a magnetic recording layer comprising: a write head comprising a main pole; a first electrically conductive coil coupled to the main pole for generating magnetic flux in the main pole, the first coil having one end connected to a first terminal and its other end connected to a common terminal; and a second electrically conductive coil connected to the first coil and coupled to the main pole for generating magnetic flux in the main pole, the second coil having one end connected to a second terminal and its other end connected to said common terminal; a write driver for supplying write current to the first and second coils; a transmission line having one end connected to the write driver and the other end connected to said first and second terminals; and a lead-time circuit at said other end of said transmission line and connected between said common terminal and one of said first and second coils for causing write current to one of the coils to lead the write current to the other coil when the write driver switches the direction of write current to the first and second coils.