CRYOGENIC GaAs-FET AMPLIFIERS FOR SQUIDSReport as inadecuate




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Abstract : Gallium arsenide field effect transistor amplifiers for use with SQUIDs at 4.2 K in the frequency range 50 - 500 MHz have been developed. The system sensibility is limited by intrinsic SQUID noise and is 5 x 10-30 J-Hz à 500 MHz. Design criteria and practical limitations are discussed in terms of small signal equivalent circuits.





Author: H. Ahola G. Ehnholm P. Ostman B. Rantala

Source: https://hal.archives-ouvertes.fr/



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