Patent ID: 8189281
Filing Date: 2012-05-29
Classification: G11B

Abstract:
1. In a magnetic recording disk drive having write driver circuitry having a source impedance and an inductive write head having a load impedance, an interconnect between the write driver circuitry and the write head comprising: a two-segment transmission line connecting the write driver circuitry to the write head, the first segment connecting the write driver circuitry to the second segment and having an effective characteristic impedance that substantially matches the source impedance, and a second segment connecting the first segment to the write head; wherein the first segment comprises at least two transmission line sections, the first section connected to the write driver and having a characteristic impedance substantially greater than the source impedance; and wherein the transmission line comprises a first set of electrically conductive traces for positive (+W) write signals and a second set of electrically conductive traces for negative (−W) write signals, and the +W and −W signal traces are interleaved.