Patent ID: 7035027

Claim:
A write driver circuit adapted to drive a mass media head, comprising: an H-switch having a pair of differential inputs and a pair of differential outputs adapted to drive the head; an ECL pre-driver circuit coupled to and driving said H-switch; a switching current mode logic boosting circuit coupled to the ECL pre-driver circuit, wherein the boosting circuit comprises a first pair of transistors switching a write data signal coupled to the H-switch, wherein the boosting circuit further comprises a second set of transistors switching a pulsing signal to create a write current coupled to the H-switch, wherein the boosting circuit further comprises a third set of transistors operating in conjunction with the second set of transistors to switch the pulsing signal in the opposite direction, wherein said ECL pre-driver circuit comprises a series of emitter-follower transistors adapted to build current and voltage drive capability to drive the H-switch, and wherein said first, second and third set of transistors comprise of PMOS devices.