Analysis and optimization of write channel front end for above 1 Gb/s recording

Author

Fang, Hao ; Zhou, Yuming ; Fernandez-de-Castro, Juan

Author_Institution

Seagate Technol., Bloomington, MN, USA

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1935

Lastpage

1937

Abstract

A system level model was developed to simulate the overall write process and study pattern dependent nonlinearities. It was found that in order to reduce field NLTS, we need a large peak current, fast rise time, long-lasting overshoot, large RPM, low interconnect impedance and large voltage supply. Design tradeoffs are explored extensively through a quadratic DOE. An improved slew rate is more efficient in achieving 1.2 Gfr/s at 15 k RPM than that of a large peak current. Both larger overshoot duration and lower interconnect impedance reduce the write driver voltage headroom requirement

Keywords

design of experiments; digital magnetic recording; electric impedance; interconnections; modelling; optimisation; 1 to 1.2 Gbit/s; design tradeoffs; field NLTS reduction; front end optimization; interconnect impedance; large RPM; large voltage supply; long-lasting overshoot; low interconnect impedance; overshoot duration; pattern dependent nonlinearities; peak current; quadratic DOE; rise time; slew rate; system level model; write channel front end; write driver voltage headroom requirement; Disk recording; Impedance; Integrated circuit interconnections; Magnetic flux; Magnetic heads; Magnetic recording; Propagation losses; Steady-state; US Department of Energy; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.951013

Filename

951013