Magnetically coupled linear isolator

Author

Hermann, T.M. ; Black, W.C. ; Hui, S.

Author_Institution

Nonvolatile Electron. Inc., Eden Prairie, MN, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

4029

Lastpage

4031

Abstract

A linear isolation device has been fabricated using giant magnetoresistance (GMR) thin film structures to sense current in a planar coil across a Si₃N₄ insulation barrier. NiFe shields are electroplated to improve signal and shield stray field noise. The devices were connected to an external current replicating circuit realized from discrete components. Measured output characteristics include nonlinearity of less than 1%, and withstanding voltages over 2.5 kV

Keywords

coils; electric current measurement; giant magnetoresistance; magnetic multilayers; magnetic noise; magnetic sensors; magnetic shielding; magnetoresistive devices; 1.2 kV; 2.68 kV; GMR thin film structures; NiFe shields; Si₃N₄; Si₃N₄ insulation barrier; Ta-NiFeCo-CoFe-Cu-CoFe-NiFeCo-Ta; current sensing; electroplating; external current replicating circuit; magnetically coupled linear isolator; multi-channel isolation; nonlinearity; output characteristics; planar coil; stray field noise shielding; withstanding voltages; Circuit noise; Coils; Couplings; Giant magnetoresistance; Insulation; Isolators; Magnetic shielding; Semiconductor thin films; Thin film circuits; Thin film devices;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619652

Filename

619652