Smart SQUIDs based on Relaxation Oscillation SQUIDs


Duuren, M.J. van and Brons, G.C.S. and Flokstra, J. and Rogalla, H. (1999) Smart SQUIDs based on Relaxation Oscillation SQUIDs. IEEE Transactions on Applied Superconductivity, 9 (2, Par). pp. 2919-2922. ISSN 1051-8223

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Abstract:Smart SQUIDs based on double Relaxation Oscillation SQUIDs (DROS) and a superconducting up-down counter have been developed. DROS and counter form a flux locked loop on one single chip. The DROS output consists of a series of pulses that controls the two up and down write gates of the counter. The pulsed output structure of the DROS constitutes the internal clock for this single-chip device. Several prototypes were built with a clock frequency of 100 MHz, a linear operation flux range of about 2.5 ¿0, and a white noise level of 6.5 ¿¿0/¿Hz. The smart SQUID is in principle a promising device for application in multichannel SQUID systems
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Copyright:©1999 IEEE
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