JFET cooled amplifier for d.c. SQUID
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G.V. Pallottino; A.E. Zirizzotti
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Article
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1994
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Elsevier Science
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English
โ 221 KB
The circuit of a low noise FET amplifier is described which presents a voltage noise of 0.46 nV Hz -~/2 when working at liquid nitrogen temperature. This amplifier has been designed as the second stage for a d.c. SQUID amplifier with a modulation frequency of 80 kHz.