DISK DRIVE WRITER EMPLOYING ACTIVE REFLECTION CANCELLATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a disk drive writer adopting an active reflection cancellation system.;SOLUTION: A write driver circuit selectively provides a write current through a write head in first and second opposite directions. The write driver circuit is connected to the write head through an interconnection. The write driver circuit provides an incident write current signal through the interconnection to the write head, and also provides a reflection cancellation signal through the interconnection to the write head. In an exemplary embodiment, the incident write current signal is provided by providing an incident voltage signal across the write head, and the reflection cancellation signal is provided by applying an incident voltage signal across the write head. In an exemplary embodiment, the reflection cancellation signal is a delayed and filtered version of the incident write current signal that cancels a reflected signal that is reflected at the interface between the interconnection and the write head due to impedance mismatching.;COPYRIGHT: (C)2004,JPO