A study on signal processing for enhanced density in vertical recording systems with MIG head

摘要

A waveform equalization technique is developed to enhance the recording density of a R/W (read/write) channel with a metal-in-gap (MIG) head and a CoCr single-layer medium. This equalization reduces the intersymbol interference of the reproduced pulse by eliminating the subpulse caused by the pseudogap of the MIG head and by transforming an asymmetric dipulse into a symmetric single pulse. By combining this equalizer with a head impedance equalizer and a write current equalizer, a high recording density channel of about 30 kfr/mm/sup 2/ was attained.