Title :
A study on signal processing for enhanced density in vertical recording systems with MIG head
Author :
Kato, T. ; Takanami, S. ; Hirono, S. ; Sato, I.
Author_Institution :
NTT Appl. Electron. Lab., Tokyo, Japan
fDate :
9/1/1989 12:00:00 AM
Abstract :
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/mm2 was attained
Keywords :
equalisers; intersymbol interference; magnetic heads; magnetic recording; signal processing; waveform analysis; CoCr single layer medium; enhanced density; head impedance equalizer; high recording density channel; intersymbol interference; metal in gap head; read/write channel; recording density; reproduced pulse; signal processing; symmetric single pulse; vertical recording systems; waveform equalization technique; write current equalizer; Capacitors; Delay lines; Equalizers; Impedance; Intersymbol interference; Low pass filters; Magnetic heads; Perpendicular magnetic recording; Signal processing; Transfer functions;
Journal_Title :
Magnetics, IEEE Transactions on
