Universal active de biasing system for a high-tc squid based on a liquidnitrogen-cooled preamplifier

IEEE Transactions on Applied Superconductivity

Volumn 9, Issue 2 PART 3, 1999, Pages 4416-4419

  Ukhansky, N N ^a   Dorrer, L ^b   Schmidl, F ^a   Seidel, P ^b  

^a PUSHKOV INSTITUTE OF TERRESTRIAL MAGNETISM   (Russian Federation)

^b FRIEDRICH SCHILLER UNIVERSITY JENA   (Germany)

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRIC RESISTANCE; MAGNETIC FLUX; MAGNETOMETERS; READOUT SYSTEMS; SIGNAL NOISE MEASUREMENT; SQUIDS; WHITE NOISE;

ACTIVE DC BIASING SYSTEM; BIASING SOURCE OUTPUT RESISTANCE; CURRENT BIASING CIRCUIT; CUT-OFF FREQUENCY; LIQUID NITROGEN COOLED PREAMPLIFIER; WHITE FLUX NOISE;

AMPLIFIERS (ELECTRONIC);

EID: 0032655215     PISSN: 10518223     EISSN: None     Source Type: Journal    
DOI: 10.1109/77.784004     Document Type: Article

References (8)

1. 7-x, de SQUID Magnetometers with Bicrystal Junctions for Biomagnetic Multichannel Applications, ISEC'97, Berlin, Germany, June 25-28, 1997.
2. G. M. Daalmans, HTS DC SQUIDs for practical applications. Appl. Supercond. 3, pp. 399-423, 1995.
3. N.N. Ukhansky, S.A. Gudoshnikov, R. Weidl, L. Dörrer and P. Seidel A Liquid-Nitrogen-Cooled Preamplifier in Connection with a High-Tc SQUID: Direct Readout and Flux-Locked Loop with ac Bias , ISEC'97, Berlin, Germany, June 25-28, 1997.
4. B. L. Blackford Low Impedance Supply for Tunnel Junctions Rev. Sci. Instr., V 42, N 8, p. 1198-1202, August 1971.
5. C. Dolabdjian, D. Robbes, E. Lesquey and Y. Monfort "Active voltage biasing of very low impedance devices" Rev. Sci. Instrum. 64 (3), pp. 821, March 1993.
6. N.N. Ukhansky, S.A. Gudoshnikov, I.I. Vengrus, and O.V. Snigirev. Low noise liquid-nitrogen-cooled preamplifier for a high-Tc SQUID. Ext. Abst. ISEC'95, September 18-21, 1995 Nagoya, Japan, pp. 346-348
7. P. Seidel, F. Schmidl, R. Weidl, S. Brabetz, F. Klemm, S. Wunderlich and L. Dorrer, Development of heart monitoring system based on thin film high-Tc DC-SQUIDs IEEE Trans. Appl. Supercond., vol. 7, no. 2 pp.3040-3043. June 1997.
8. M. Lam Chok Sing, C. Dolabdjian, C, Gunter, and D. Bloyet. A formai presentation and comparative study of low-frequency noise reduction techniques for direct current superconducting quantum interference devices. Rev. Sci. Instr. vol. 67, pp. 7 96-804, March 1996.