Title :
Conceptual design of a versatile radiation tolerant integrated signal conditioning circuit for resistive sensors
Author :
Leroux, P. ; Sterckx, J. ; Van Uffelen, M. ; Damiani, C.
Abstract :
This paper presents the design of a radiation tolerant configurable discrete time CMOS signal conditioning circuit for use with resistive sensors like strain gauge pressure sensors. The circuit is intended to be used for remote handling in harsh environments in the International Thermonuclear Experimental fusion Reactor (ITER). The design features a 5 V differential preamplifier using a Correlated Double Sampling (CDS) architecture at a sample rate of 20 kHz and a 24 V discrete time post amplifier. The gain is digitally controllable between 27 and 400 in the preamplifier and between 1 and 8 in the post amplifier. The nominal input referred noise voltage is only 8.5 μV while consuming only 1 mW. The circuit has a simulated radiation tolerance of more than 1 MGy.
Keywords :
CMOS integrated circuits; computerised instrumentation; fusion reactor instrumentation; instrumentation amplifiers; nuclear engineering computing; nuclear reactor maintenance; preamplifiers; radiation hardening (electronics); remote handling; signal conditioning circuits; signal processing equipment; CMOS signal conditioning circuit; ITER; International Thermonuclear Experimental Fusion Reactor; configurable signal conditioning circuit; correlated double sampling architecture; differential preamplifier; discrete time post amplifier; discrete time signal conditioning circuit; harsh environments; integrated signal conditioning circuit; radiation tolerant signal conditioning circuit; remote handling; resistive sensors; signal conditioning circuit design; CMOS integrated circuits; Capacitors; Noise; Preamplifiers; Sensors; Transconductance; Transistors; International Experimental Thermonuclear fusion Reactor (ITER); instrumentation amplifier; radiation hardening; signal conditioning;
Conference_Titel :
Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), 2011 2nd International Conference on
Conference_Location :
Ghent
Print_ISBN :
978-1-4577-0925-8
DOI :
10.1109/ANIMMA.2011.6172870
