Title :
A Low-Noise Low-Input Conductance Preamplifier for Gravitational Research
Author :
Pallottino, G.V. ; Vannaroni, Giuliano
Abstract :
We report on the specification, the design, and the characterization of a FET-input low-noise preamplifier with low-input conductance that has been developed for gravitational-wave research. At approximately 900 Hz the noise temperature of the preamplifier is 69 mK and its input conductance is ~ -2 nS. This preamplifier has recently been used during the first cooling to liquid helium of a 2.2-ton gravitational-wave antenna equipped with a capacitive resonant transducer.
Keywords :
Capacitance; Equivalent circuits; Magnetic noise; Magnetic resonance; Preamplifiers; Resonant frequency; Temperature; Transducers; Vibrations; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1985.4315433
