Abstract: A system for preventing crosstalk noise in a head of a drive for a reading data from and writing data to a magnetic media. The present invention includes circuitry that applies an intermediate current to a write element after a write operation is complete. The intermediate current causes the magnetic domains of the write element to go from a high energy state to an intermediate energy state before going to a low energy state. This reduces the magnetic pulses emitted from the write element.

Abstract: A write precompensation circuit employs a frequency synthesizer for providing a variable timing signal linked to variable transfer rate in a track zone recording system of a disk drive. The synthesizer also provides an operating frequency current sense signal that is used to generate bit shift of data bits being recorded. A ramp voltage on a ramp capacitor and a logic signal from a bit shift decision circuit are determinative of the magnitude and direction of bit shift, early or late. The VCO and its capacitor are formed on the same IC chip as the ramp capacitor thereby minimizing mismatch due to tolerances inherent in production and operation of electrical components.