Title :
Hard disk drive read channels: technology and trends
Author :
Thapar, Hemant ; Lee, Sang-Soo ; Conroy, Connac ; Contreras, Richard ; Yeung, Alfred ; Chern, Jenn-Gang ; Pan, Tzuwang ; Shih-Ming Shih ; Shih-Ming Shih
Author_Institution :
DataPath Syst. Inc., Los Gatos, CA, USA
Abstract :
Advances in read channel technology over the past 8 years have contributed approximately 50% to the areal density growth in magnetic hard disk drive (HDD) systems. This paper provides an overview of HDD read channel technology and trends. Dominant channel impairments are discussed along with signal processing methods to mitigate their effects. Equalization and coding techniques, capable of achieving higher areal densities, are reviewed. Finally, circuit design challenges in meeting the emerging data rate requirement of 1 Gb/s in read channel products are discussed
Keywords :
disc drives; equalisers; hard discs; 1 Gbit/s; areal density growth; channel impairments; coding techniques; data rate requirement; equalization techniques; hard disk drive; read channels; signal processing methods; CD-ROMs; Circuit synthesis; Costs; Drives; Hard disks; Maximum likelihood detection; Memory; Moore´s Law; Pervasive computing; Signal processing;
Conference_Titel :
Custom Integrated Circuits, 1999. Proceedings of the IEEE 1999
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-5443-5
DOI :
10.1109/CICC.1999.777297
