Philips Semiconductors
Magnetoresistive sensors for
magnetic field measurement
General
handbook, halfpage | R |
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H
MLC128
Fig.3 The resistance of the permalloy as a function of the external field.
In this basic form, the MR effect can be used effectively for angular measurement and some rotational speed measurements, which do not require linearization of the sensor characteristic.
In the KMZ series of sensors, four permalloy strips are arranged in a meander fashion on the silicon (Fig.4 shows one example, of the pattern on a KMZ10). They are connected in a Wheatstone bridge configuration, which has a number of advantages:
∙Reduction of temperature drift
∙Doubling of the signal output
∙The sensor can be aligned at the factory.
handbook, full pagewidth
MBC930
Fig.4 KMZ10 chip structure.
2000 Sep 06 | 4 |
