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Compound Semiconductor Applications for Automotive Sensors

Published online by Cambridge University Press:  10 February 2011

M. W. Pelczynski ,
J. J. Heremans  and
S. Schwed
M. W. Pelczynski
Affiliation:
EMCORE Corporation, Somerset, NJ
J. J. Heremans
Affiliation:
EMCORE Corporation, Somerset, NJ
S. Schwed
Affiliation:
EMCORE Corporation, Somerset, NJ
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Abstract

Compound semiconductors find extensive application as magnetic position sensors in the automotive environment. Typical applications involve the sensor element, a permanent magnet attached to the sensor, and a moving magnetic circuit -a target wheel. Wider mechanical gaps in the magnetic circuit can be utilized with a sensor of higher sensitivity, and thus high sensitivity is valuable. Further limitations on the choice of materials are imposed by temperature sensitivity, as the automotive environment is characterized by wide temperature operating ranges (-40°C up to 200°C). The magnetic signal may be hidden by the temperature drift in the sensor output, andthus temperature stability limits the sensor's resolution. Automotive position sensors find use in ignition timing and misfire detection (cam and crank sensors), as wheel speed sensors (anti-lock brakes and other types of active wheel-control), in brushless electric motors and several other applications. This work reviews progress achieved to refine the use of InSb for automotive sensing applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 607: Symposium OO – Infrared Applications of Semiconductors III , 1999 , 65
Copyright
Copyright © Materials Research Society 2000

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