Low-noise FET amplifier for dc SQUID

Journal Article · Sat Sep 01 00:00:00 EDT 1990 · Review of Scientific Instruments; (USA)

DOI:https://doi.org/10.1063/1.1141957· OSTI ID:6427182

Pallottino, G V; Lupi, T ^[1]

---

1. Dipartimento di Fisica, Universita La Sapienze,'' Rome (Italy)

We report on the design, characterization, and operation of a low-noise FET-input differential amplifier, which is used as second stage for a dc SQUID in the electronic instrumentation of the gravitational wave detector of the Rome group at CERN. The 3-dB bandwidth of the amplifier is from 10 kHz to 1.5 MHz. At the SQUID modulation frequency of 70 kHz the voltage noise is 0.5 nV/(Hz){sup 1/2}, the current noise is 35 fA/(Hz){sup 1/2}.

• OSTI ID: 6427182
• Journal Information: Review of Scientific Instruments; (USA), Journal Name: Review of Scientific Instruments; (USA) Vol. 61:9; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
640106 -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AMPLIFIERS
CERN
DESIGN
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUXMETERS
GRAVITATIONAL WAVE DETECTORS
INTERNATIONAL ORGANIZATIONS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NOISE
PERFORMANCE
RADIATION DETECTORS
SQUID DEVICES
SUPERCONDUCTING DEVICES
TRANSISTOR AMPLIFIERS