Am angledetector based on magnetic sensing

Thomas Kaulberg; Gudmundur Bogason

doi:10.1109/ISCAS.1994.409374

Am angledetector based on magnetic sensing

Thomas Kaulberg, Gudmundur Bogason

Research output: Chapter in Book/Report/Conference proceeding › Article in proceedings › Research › peer-review

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Abstract

An angledetector with a digital output is described. The component is meant as an alternative to the traditional slide potentiometer used as volume control in many hearing aid applications. The component is based on the use of magnetic sensitive MOSFET's (MAGFET's) detecting the position of a tiny bar magnet placed above a silicon chip. Because of the galvanic separation between the anglesetting bar magnet and the electrical circuit, this component is insensitive to the rather hostile environment hearing aids are exposed to. The lifetime of the component is thereby increased significantly. The electrical circuit contains a switched current A/D-D/A conversion system for offset compensating the MAGFET's and for converting the MAGFET signal currents into a digital output proportional to the input angle. It is implemented using a commercially available 1.5 μm CMOS process

Original language	English
Title of host publication	Proceedings of the IEEE International Symposium on Circuits and Systems
Volume	Volume 5
Publisher	IEEE
Publication date	1994
Pages	329-332
ISBN (Print)	07-80-31915-X
DOIs	https://doi.org/10.1109/ISCAS.1994.409374
Publication status	Published - 1994
Event	1994 IEEE International Symposium on Circuits and Systems - London, United Kingdom Duration: 30 May 1994 → 2 Jun 1994 http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=3224

Conference

Conference	1994 IEEE International Symposium on Circuits and Systems
Country	United Kingdom
City	London
Period	30/05/1994 → 02/06/1994
Internet address	http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=3224

Bibliographical note

Copyright: 1994 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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title = "Am angledetector based on magnetic sensing",

abstract = "An angledetector with a digital output is described. The component is meant as an alternative to the traditional slide potentiometer used as volume control in many hearing aid applications. The component is based on the use of magnetic sensitive MOSFET's (MAGFET's) detecting the position of a tiny bar magnet placed above a silicon chip. Because of the galvanic separation between the anglesetting bar magnet and the electrical circuit, this component is insensitive to the rather hostile environment hearing aids are exposed to. The lifetime of the component is thereby increased significantly. The electrical circuit contains a switched current A/D-D/A conversion system for offset compensating the MAGFET's and for converting the MAGFET signal currents into a digital output proportional to the input angle. It is implemented using a commercially available 1.5 μm CMOS process",

author = "Thomas Kaulberg and Gudmundur Bogason",

note = "Copyright: 1994 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE; 1994 IEEE International Symposium on Circuits and Systems, ISCAS '94 ; Conference date: 30-05-1994 Through 02-06-1994",

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doi = "10.1109/ISCAS.1994.409374",

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booktitle = "Proceedings of the IEEE International Symposium on Circuits and Systems",

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AU - Kaulberg, Thomas

AU - Bogason, Gudmundur

N1 - Copyright: 1994 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

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N2 - An angledetector with a digital output is described. The component is meant as an alternative to the traditional slide potentiometer used as volume control in many hearing aid applications. The component is based on the use of magnetic sensitive MOSFET's (MAGFET's) detecting the position of a tiny bar magnet placed above a silicon chip. Because of the galvanic separation between the anglesetting bar magnet and the electrical circuit, this component is insensitive to the rather hostile environment hearing aids are exposed to. The lifetime of the component is thereby increased significantly. The electrical circuit contains a switched current A/D-D/A conversion system for offset compensating the MAGFET's and for converting the MAGFET signal currents into a digital output proportional to the input angle. It is implemented using a commercially available 1.5 μm CMOS process

AB - An angledetector with a digital output is described. The component is meant as an alternative to the traditional slide potentiometer used as volume control in many hearing aid applications. The component is based on the use of magnetic sensitive MOSFET's (MAGFET's) detecting the position of a tiny bar magnet placed above a silicon chip. Because of the galvanic separation between the anglesetting bar magnet and the electrical circuit, this component is insensitive to the rather hostile environment hearing aids are exposed to. The lifetime of the component is thereby increased significantly. The electrical circuit contains a switched current A/D-D/A conversion system for offset compensating the MAGFET's and for converting the MAGFET signal currents into a digital output proportional to the input angle. It is implemented using a commercially available 1.5 μm CMOS process

U2 - 10.1109/ISCAS.1994.409374

DO - 10.1109/ISCAS.1994.409374

M3 - Article in proceedings

SN - 07-80-31915-X

VL - Volume 5

SP - 329

EP - 332

BT - Proceedings of the IEEE International Symposium on Circuits and Systems

PB - IEEE

T2 - 1994 IEEE International Symposium on Circuits and Systems

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