A four-transistor circuit is described for a battery-operated magnetometer that has 0.1 γ resolution using t-in diameter 4–79 or 6–81 Mo-Permalloy tape cores of 20–40 Mx capacity. The center-tapped drive winding also serves as the sense winding, simplifying the sensor assembly. Some signal-to-noise results are presented to illustrate the fairly wide difference that may exist between cores of the same cross section and to demonstrate the advantage of reducing core area. Copyright © 1971 by The Institute of Electrical and Electronics Engineers, Inc.
S. V. Marshall, "A Gamma-Level Portable Ring-Core Magnetometer," IEEE Transactions on Magnetics, vol. 7, no. 1, pp. 183 - 185, Institute of Electrical and Electronics Engineers, Jan 1971.
The definitive version is available at https://doi.org/10.1109/TMAG.1971.1067000
Electrical and Computer Engineering
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01 Jan 1971