Read/write amplifier design considerations for MR heads

Author

Klaassen, K.B. ; van Peppen, J.C.L.

Author_Institution

IBM Res. Div., Almaden Res. Center, San Jose, CA, USA

Volume

31

Issue

2

fYear

1995

fDate

3/1/1995 12:00:00 AM

Firstpage

1056

Lastpage

1061

Abstract

This paper presents a number of considerations that have to be taken into account when read/write amplifiers for magnetoresistive-read/inductive-write recording heads. It discusses various concepts for implementation of magnetoresistive (MR) pre-amplifiers, the noise and bandwidth obtainable, different techniques for biasing the MR sensor and a number of alternative signal sensing schemes. Different forms of required sensor protection are dealt with as well. The flagging of a number of possible mis-operations is reviewed and, finally, the write amplifier design for these MR/inductive heads is briefly touched upon.<>

Keywords

circuit noise; differential amplifiers; magnetic heads; magnetoresistive devices; preamplifiers; protection; MR heads; amplifier design; bandwidth; biasing; magnetoresistive preamplifiers; magnetoresistive-read/inductive-write heads; noise; read amplifier; read/write amplifiers; recording heads; sensor protection; signal sensing schemes; write amplifier; Actuators; Bandwidth; Disk recording; Driver circuits; Magnetic heads; Magnetic recording; Magnetic sensors; Magnetoresistance; Memory; Transducers;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.364784

Filename

364784