The transfer function of a ferrite head

Author

Valstyn, Erich P. ; Hadiono, Teddy

Author_Institution

Western Digital Corp., San Jose, CA, USA

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

2424

Lastpage

2426

Abstract

In read-channel analysis, the head transfer function is usually derived on the basis of a simple equivalent circuit which does not take into account the frequency-dependent complex permeance of the magnetic circuit. In the present work, equations for the transfer function and the impedance of the head are derived taking this permeance into account. It is shown that some of the head parameters which are required for computing the transfer function, but which are very difficult to determine either analytically or by direct measurement, can be found by measuring the head impedance at several frequencies and fitting theoretical impedance function to the experimental results. The transfer function of a ferrite head with 27 bifilar turns was computed with the method

Keywords

ferrite devices; magnetic heads; transfer functions; ferrite head; frequency-dependent complex permeance; impedance; read-channel analysis; transfer function; Capacitance; Coils; Equivalent circuits; Ferrites; Frequency measurement; Impedance measurement; Inductance; Magnetic circuits; Magnetic heads; Transfer functions;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104752

Filename

104752