Title :
An Amplifier for Bolometric Detectors
Author :
Arnaboldi, Claudio ; Giachero, Andrea ; Gotti, Claudio ; Maino, Matteo ; Pessina, Gianluigi
Author_Institution :
Dipt. di Fis., Univ. di Milano-Bicocca, Milan, Italy
Abstract :
We describe the last stage of a readout for bolometric detectors consisting of a source follower Si-JFET held at its optimum temperature of operation and a room temperature second stage. Stringent limits on both white and low frequency noise are required. We present our design solution for the second-stage differential amplifier operated at room-temperature. A special circuit has been employed to achieve very low series noise. Possible noise sources from the power supply have been addressed and rejected. The amplifier features a white noise floor of about 400 pV/√Hz and low-frequency noise of 850 pV/√Hz at 1 Hz.
Keywords :
amplifiers; bolometers; junction gate field effect transistors; nuclear electronics; particle detectors; power supplies to apparatus; readout electronics; semiconductor device noise; thermistors; Si-JFET source follower; bolometric detector amplifier; bolometric detector readout last stage; low frequency noise; optimum operation temperature; power supply; room temperature second stage; second stage differential amplifier design; series noise; white noise floor; 1f noise; Bolometers; Detectors; Signal to noise ratio; Thermal management of electronics; Transistors; 1/f noise; Analog circuit; signal-to-noise ratio; thermal management of electronics;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2011.2171367
