Method of detecting abnormality in magnetic head, circuit theref

Details Method of detecting abnormality in magnetic head, circuit theref Method of detecting abnormality in magnetic head, circuit theref

1997-07-15

2000-05-09

Ballato, Josie

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

Of individual circuit component or element

324213, G01R 3106

Patent

active

060608870

ABSTRACT:
A circuit and method for detecting an abnormality in a recording head, wherein a voltage detection circuit detects a counter electromotive voltage generated across the two terminals of a recording head to which a recording current is supplied from a recording circuit; a processing circuit generates the maximum, minimum, and mean voltages from the counter electromotive voltage; a discrimination circuit using these voltages determines whether an abnormality occurs in the recording head. An output circuit outputs the result. With this operation, an abnormality in the recording head having two terminals in an MR head can be detected with a high precision.

REFERENCES:
patent: 5589777 (1996-12-01), Davis
patent: 5696445 (1997-12-01), Inbar
patent: 5721488 (1998-02-01), Sakai

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