Title :
Readout and signal processing electronics for 2×2 CZT detectors in parallel
Author :
Shi, Zhubin ; Sang, Wenbin ; Qian, Yongbiao ; Teng, Jianyong ; Min, Jiahua ; Fan, Jianrong
Author_Institution :
Sch. of Mater. Sci. & Eng., Shanghai Univ., Shanghai, China
Abstract :
In this paper, the readout system for 2×2 CdZnTe (CZT) detectors in parallel was designed and fabricated with analog electronics. The equivalent noise with this readout system was in the range of 223 electrons RMS for Cd=0 pF to 1785 electrons RMS for Cd=330 pF. The output signal of the preamplifier was about 130 mV, the signal duration was about 0.2 ms and the signal rise time was about 900 ns, when the CZT detector biased at -1250 V was exposed to the radiation source 137Cs (662 keV)with the shaping time of 2.2 us. The ratio of signal to noise (SNR) is about 27:1, after the signal through summing circuit.
Keywords :
detector circuits; readout electronics; CZT detector; CdZnTe; SNR; analog electronics; equivalent noise; preamplifier; readout system; signal processing electronics; signal to noise ratio; time 0.2 mus; time 2.2 mus; time 900 ns; voltage 1250 V; voltage 130 mV; Detectors; Electrons; Preamplifiers; Semiconductor device noise; Sensor arrays; Signal design; Signal processing; Signal to noise ratio; Spectroscopy; Summing circuits;
Conference_Titel :
Solid-State and Integrated-Circuit Technology, 2008. ICSICT 2008. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2185-5
Electronic_ISBN :
978-1-4244-2186-2
DOI :
10.1109/ICSICT.2008.4734711
