Radiation hardened magnetic voltage and/or current reference pro

Details Radiation hardened magnetic voltage and/or current reference pro Radiation hardened magnetic voltage and/or current reference pro

1989-08-21

1990-12-11

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

323253, 324225, G01R 3304, G05F 1335

Patent

active

049773747

ABSTRACT:
A highly accurate, predictable and stable magnetic voltage and/or current reference that is substantially impervious to potentially hazardous radiation including neutrons, single or multiple particles, ionizing doses, particle beams and the like. The magnetic reference includes a stable permanent magnet which functions as a primary magnetic reference and generates a magnetic field. A magnetic field detector, comprising a second harmonic null detector (or fluxgate), senses the magnetic field generated by the magnet. A fed back current applied to control windings of the magnetic field detector cancels the magnetic field generated by the magnet and, in so doing, produces an AC error signal. This AC error signal is processed by an electronic control amplifier which provides the current that is fed back to the magnetic field detector. The output of the electronic control amplifier is a precise voltage and/or current which is applicable to precision electronics that may be exposed to radiation within a hostile environment.

REFERENCES:
patent: 2388070 (1945-10-01), Middel
patent: 3159785 (1964-12-01), Beynon
patent: 3218547 (1965-11-01), Ling
patent: 3286169 (1966-11-01), Slonczewski
patent: 3919630 (1975-11-01), Oshima et al.
patent: 4059796 (1977-11-01), Rhodes
patent: 4100492 (1978-07-01), Forster
patent: 4677381 (1987-06-01), Geerlings
Geyger, William A., "The Ring-Core Magnetometer-A New Type . . . Magnetometer", AIEE transactions, V. 81, pt. 1 (Communications & Electronics) #59, Mar. 1962, pp. 65-73.

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