A broadband picovoltmeter based on the direct current superconducting quantum interference device with additional positive feedback

Polushkin, Vladimir; Drung, Dieter; Koch, Hans

doi:https://doi.org/10.1063/1.1144593

Zugriffsnummer	30588
Dokumenttyp	Zeitschriftenartikel
Sprache	Englisch
Titel	A broadband picovoltmeter based on the direct current superconducting quantum interference device with additional positive feedback
Autor(in); Institution	Polushkin, Vladimir; 9.33, Kryoelektronik, PTB-Berlin Drung, Dieter; 9.33, Kryoelektronik, PTB-Berlin Koch, Hans; 9.33, Kryoelektronik, PTB-Berlin
Quelle/Jahr	Review of Scientific Instruments: 65 (1994), 9, 3005 - 3011
ISSN	0034-6748 (PRINT) ; 1089-7623 (ONLINE)
DOI	https://doi.org/10.1063/1.1144593
Verlag	American Institute of Physics (AIP)
Freie Schlagworte	Superconducting quantum interference devices ; Direct current power transmission
Zusammenfassung	A picovoltmeter working at 4.2 K and based on a direct currentsuperconducting quantum interference device (dc SQUID) with additional passive positive feedback for investigating the properties of superconducting thin films,Josephson junctions, and SQUIDs has been developed. It has a large small‐signal bandwidth f _m ≂800 kHz, a slew rate of ≂38 mV/s, a dynamic range of 146 dB, and a voltage resolution of 5 pV/Hz^1/2 for a signal source impedance R _s =0 Ω. The noise temperature is ≂0.6 K for R _s =1 Ω. In this article the dynamics and noise properties of the instrument are discussed.

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Polushkin, V., Drung, D., & Koch, H. (1994). A broadband picovoltmeter based on the direct current superconducting quantum interference device with additional positive feedback. Review of Scientific Instruments, 65(9), 3005–3011. https://doi.org/10.1063/1.1144593

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