Open-loop current mode biasing scheme for MR head

Details Open-loop current mode biasing scheme for MR head Open-loop current mode biasing scheme for MR head

1996-10-10

1998-11-10

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327538, 360 66, G01R 1900

Patent

active

058349529

ABSTRACT:
A biasing circuit for a two terminal sensing element has two separate biasing elements. Both biasing elements are controlled by a transconductance feedback circuit that controls feedback currents based upon a voltage associated with the sensing element. Both biasing elements also receive an activation value from an activation circuit. The activation value activates both biasing elements directly, without using the feedback loop.

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patent: 5444579 (1995-08-01), Klein et al.
patent: 5534818 (1996-07-01), Peterson
patent: 5635868 (1997-06-01), Aiello et al.

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