A series array of DC SQUIDs

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 1991Publisher:Institute of Electrical and Electronics Engineers (IEEE)Journal:IEEE Transactions on Magnetics, volume 27, pages 2,924-2,926 (issn: 0018-9464, eissn: 1941-0069,

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Authors: Welty, R. P.; Martinis, J. M.;

doi: 10.1109/20.133821

A series array of DC SQUIDs

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Abstract

A series array of 100 DC SQUIDs has been fabricated using trilayer Nb-AlO/sub x/-Nb junctions. The SQUIDs are modulated with a common flux bias line and produce an output voltage swing of several millivolts across the array. The large output voltage will allow direct connection to room temperature electronics without the transformer coupling and resulting frequency limitations commonly associated with DC SQUID amplifiers. A bandwidth of DC to at least 175 MHz for a 100-SQUID array has been measured. The series array will be used as the output stage for a multistage integrated SQUID amplifier.

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University of Colorado Boulder
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