Title :
A low DC drift read-out system for a large mass bolometric detector
Author :
Alessandrello, A. ; Brofferio, C. ; Bucci, C. ; Camin, D.V. ; Cremonesi, O. ; Giuliani, A. ; Nucciotti, A. ; Pavan, M. ; Pessina, G. ; Previtali, E. ; Sablich, G.
Author_Institution :
Ist. Nazionale di Fisica Nucl., Milan, Italy
fDate :
6/1/1997 12:00:00 AM
Abstract :
We present a read-out system for large mass bolometric detectors. It consists of a differential voltage-sensitive preamplifier having very low series and parallel noise, thanks to the use of a pair of selected silicon JFET at the input. Very good electrical characteristics were obtained. DC power supply rejection ratio, thermal drift of input offset voltage and input leakage current are minimized by using novel circuit solutions. Parallel noise behavior was also investigated using a new measurement method which is sensitive to the shot noise generated by very small currents (tens of fA)
Keywords :
JFET integrated circuits; bolometers; detector circuits; nuclear electronics; particle detectors; preamplifiers; shot noise; DC power supply rejection ratio; Si; Si JFET; differential voltage-sensitive preamplifier; input offset voltage; large mass bolometric detector; leakage current; low DC drift read-out system; parallel noise; shot noise; thermal drift; Circuit noise; Current measurement; Detectors; Electric variables; Leakage current; Noise generators; Power supplies; Preamplifiers; Silicon; Voltage;
Journal_Title :
Nuclear Science, IEEE Transactions on
