Resistivity sense bias circuits and methods of operating the...

Details Resistivity sense bias circuits and methods of operating the... Resistivity sense bias circuits and methods of operating the...

2011-06-14

2011-06-14

Mercedes, Dismery E (Department: 2627)

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

C360S046000, C360S067000, C360S068000

Reexamination Certificate

active

07961418

ABSTRACT:
Resistivity sense bias circuits are described herein. An example resistivity sense bias circuit for use with a magnetoresistive read head includes a current biasing portion configured to provide a bias current across the magnetoresistive read head thereby establishing a bias voltage across the magnetoresistive read head, a resistivity sensing portion coupled to the current biasing portion and configured to sense a change in the bias current based on a resistivity change of the magnetoresistive read head, and a voltage source to provide the bias voltage and to adjust the bias voltage in response to the resistivity change of the magnetoresistive read head.

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