Circuit arrangement for a gradiometer having superconducting qua

Details Circuit arrangement for a gradiometer having superconducting qua Circuit arrangement for a gradiometer having superconducting qua

1990-02-20

1991-06-25

Strecker, Gerard R.

Electricity: measuring and testing

Magnetic

Magnetometers

307309, 324225, G01R 33035

Patent

active

050270699

ABSTRACT:
Circuit arrangement for a gradiometer with super conducting quantum interferometer (SQUID) for measuring low-intensity biomagnetic fields. In the circuit arrangement a modulated output voltage that is proportional to a measured magnetic field is supplied to an analog-to-digital converter for digitization and quantization, a modulated output signal of the analog-to-digital converter serving as a digital measured signal.

REFERENCES:
patent: 4315215 (1982-02-01), Onodera et al.
patent: 4389612 (1983-06-01), Simmonds et al.
patent: 4749946 (1988-06-01), Hoenig
"Instruments & Experimental Techniques"; by Lobotka et al, vol. 30, No. 3, part 2, pp. 673-677, Plenum Pub. Corp., N.Y.
Biomagnetism, "An Interdisciplinary Approach, Series A: Life Sciences", vol. 66, Plenum Press, New York, 1983 by S. N. Erne, pp. 69-85 and pp. 265-275.
Drung, D., Digital Feedback Loops for d.c. SQUIDS, Cryogenics, vol. 26, Nov. 1986, pp. 623-627.

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