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Read/write amplifier design considerations for MR heads

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2 Author(s)
K. B. Klaassen ; IBM Res. Div., Almaden Res. Center, San Jose, CA, USA ; J. C. L. van Peppen

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.<>

Published in:

IEEE Transactions on Magnetics  (Volume:31 ,  Issue: 2 )