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JFET cooled amplifier for d.c. SQUID

โœ Scribed by G.V. Pallottino; A.E. Zirizzotti

Book ID
103057914
Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
221 KB
Volume
34
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

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.

๐Ÿ“œ SIMILAR VOLUMES

Digital feedback loops for d.c. SQUIDs
Digital feedback loops for d.c. SQUIDs
โœ D. Drung ๐Ÿ“‚ Article ๐Ÿ“… 1986 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 475 KB

Digital feedback loops for d.c. SQUIDs using pulse-rate modulation are proposed and investigated by simulations and measurements. The design of a d.c. SQUID magnetometer yields a simulated energy resolution of ~-11 h (h = Planck's constant) where ~ 3 h corresponds to additional noise due to the feed