A 273 MHz low noise CMOS MR preamplifier for disk drives

Author

Kuehlwein, Jeremy ; Harjani, Ramesh

Author_Institution

Dept. of Electr. & Comput. Eng., Minnesota Univ., Minneapolis, MN, USA

fYear

1999

fDate

1999

Firstpage

347

Lastpage

351

Abstract

In this paper we present the design for a high speed low noise preamplifier for use with magnetoresistive read elements in disk drive channels. The performance of the reader circuit is comparable with the more expensive current generation of BiCMOS MR preamplifiers. The measured results include a gain of 43 dB, a 3 dB bandwidth of 273 MHz, input-referred voltage noise that is less than 0.57 nV/√(Hz), and input-referred current noise that is less than 10.54 pA/√(Hz). The preamplifier has been implemented in a 0.8-μm CMOS process and occupies a die area of 1.78×1.78 mm²

Keywords

CMOS analogue integrated circuits; disc drives; high-speed integrated circuits; integrated circuit design; integrated circuit noise; magnetoresistive devices; preamplifiers; 0.8 mum; 273 MHz; 3 dB bandwidth; 43 dB; design issues; die area; disk drive channels; disk drives; high speed low noise preamplifier design; input-referred current noise; input-referred voltage noise; low noise CMOS MR preamplifier; magnetoresistive read elements; reader circuit performance; Bandwidth; BiCMOS integrated circuits; Circuit noise; Current measurement; Disk drives; Gain measurement; Magnetoresistance; Noise measurement; Preamplifiers; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

ASIC/SOC Conference, 1999. Proceedings. Twelfth Annual IEEE International

Conference_Location

Washington, DC

Print_ISBN

0-7803-5632-2

Type

conf

DOI

10.1109/ASIC.1999.806532

Filename

806532