Smart SQUIDs based on Relaxation Oscillation SQUIDs
- van Duuren, M.J.
- Brons, G.C.S.
- Flokstra, Jakob
- Rogalla, Horst
Publication date
January 1999
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE) ISSN
1051-8223 Citation count (estimate)
6Abstract
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 system
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