Hall effect device with overlapping flux concentrators

US4587509A · kind A · utility

Assignee

• Standard Telephones and Cables Pty. Ltd. · GB

Inventors

• Gillies D. Pitt · Hewelsfield, GB
• Philip Extance · Cambridge, GB

Key dates

• Filing date: Jun 28, 1984
• Grant date: May 6, 1986
• Expiry date: Jun 28, 2004

Classification

• Technology area (CPC G): Physics
• CPC primary: G01D2205/40

Abstract

A Hall effect device for responding to weak magnetic fields uses a small chip of gallium arsenide located between the overlapped ends of two flux concentrators. The spacing between the concentrators may be as small as 95 micrometers. The flux concentrator, which serve to enhance the device's sensitivity are made of amorphous magnetic material, i.e. a metallic glass, which has high permeability.