Apparatus for determining a magnetic field

Details Apparatus for determining a magnetic field Apparatus for determining a magnetic field

1976-04-06

1978-07-04

Morrison, Malcolm A.

Boots, shoes, and leggings

73DIG3, 324251, 330 6, 364847, G01R 3306

Patent

active

040992381

ABSTRACT:
A magnetic field is determined with a Hall element having a high sensitivity. Such an element is very susceptible to a variation of environmental temperature and thus requires a compensation thereof for the determination of a magnetic field. Two electric signals, indicative of the magnitudes of the Hall voltage and the temperature, respectively, are produced and fed into respective inputs of an analog calculator to thereby indicate the determined magnitude of the magnetic field automatically. In one aspect of the invention, the temperature signal may be obtained by detecting a control voltage across the control current terminals of the Hall element during passage of the control current therethrough. Alternatively, it may be obtained by means of a thermistor.

REFERENCES:
patent: 2964738 (1960-12-01), Barney et al.
patent: 3121788 (1964-02-01), Hilbinger
patent: 3320520 (1967-05-01), Pear, Jr.
patent: 3365665 (1968-01-01), Hood
patent: 3597679 (1971-08-01), Habfast
patent: 3835373 (1974-09-01), Matula
Barlow, H. N.; Experimental Applications of Hall-Effect Wattmeters at 50Hz; IEEE Transactions on Instrumentation and Measurement; vol. 1M-14 No. 4; Dec. 1965, pp. 238-247.
Fuchs et al.; A Hall Effect Analogue Multiplier; Electronic Engineering; vol. 32, No. 392, Nov. 1960, pp. 696-699.
Motto, J. W. Jr.; Using the Hall Generator, a New Control and Instrumentation Component-Part I; Automatic Control, vol. 14, No. 6, Jun. 1961; pp. 48-53.
Kataoka, S; Multiplying Action of Magnetoresistance Effect in Semiconductors and its Application to Power Measurements; Proc. IEEE, vol. 111, No. 11, Nov. 1964.

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