Magnetic field sensor comprising two component layer transistor

Details Magnetic field sensor comprising two component layer transistor Magnetic field sensor comprising two component layer transistor

1983-06-07

1987-06-30

Karlsen, Ernest F.

Electricity: measuring and testing

Magnetic

Magnetometers

357 27, 324117R, G01R 3302, G01R 3300, H01L 2722

Patent

active

046773800

ABSTRACT:
A magnetic field sensor having two component layer transistors of opposite polarities are cross connected together and give a higher degree of sensitivity, by virtue of that feedback effect. The magnetic field sensor serves for measuring a magnetic field and is supplied by way of a costant current source from a d.c. voltage supply. In an alternative embodiment, it has a working point adjusting circuit, a change-over contact circuit, and a voltage regulator for nullifying the offset voltage.

REFERENCES:
patent: 3486085 (1969-12-01), Slavin
patent: 3610968 (1971-10-01), Yamada
patent: 3714523 (1973-01-01), Bate
patent: 3714559 (1973-01-01), Bate
patent: 3829883 (1974-08-01), Bate
patent: 3882409 (1975-05-01), Yagi
Vikulin et al, "A Magnetic Field Probe based on a Double Collector Transistor", Instruments & Experimental Techniques, vol. 17, No. 5, p. 12, pp. 1466-1467, Sep./Oct. 1974.
Vinal, "A Magnetic Sensor . . .", IBM J. Res. Develop., vol. 25, No. 3, May 1981, pp. 196-200.

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