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Multiloop integrated dc SQUID low noise RF amplifier

โœ Scribed by Michael Tarasov; George Prokopenko; Victor Belitsky; Ludmila Filippenko

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
280 KB
Volume
32
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

A new type of multiloop de SQUID in the form of a second order gradiometer with integrated input coil and extremely low stray capacitances was designed to improve SQUID amplifier parameters. For decreasing the loop inductance four partial loops were connected in parallel. Single input turns placed inside each loop were connected in series to increase the input coil inductance for better impedance matching. The amplifier noise temperature lower than 0.5 I4, and power gain nearly 20 dB were measured at 430 MHz for 60 MHz bandwidth in the case of tuned amplifier.

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