Write strategy improvements for read channel and pre-amp

摘要

Systems and techniques for compensation to improve write signal controls for magnetic-medium-based storage devices, include an apparatus comprising: pre-compensation circuitry coupled with a controller to receive a data signal and a write-current control signal and to generate a write-current signal; the pre-compensation circuitry is configured to use different baseline write-current levels for the write-current signal after an overshoot write-current level used at polarity transitions of the write-current signal, and the pre-compensation circuitry is configured use a first baseline level of the different baseline write-current levels for a first type of magnet in the sequence of magnets and use a second baseline level of the different baseline write-current levels for a second type of magnet in the sequence of magnets, the first baseline level having a greater magnitude than the second baseline level, and the first type of magnet being shorter than the second type of magnet.