Title :
Low-Noise Signal Processing Chain for High Capacitance Sensors
Author :
Adl, Sanaz ; Peckerar, Martin
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Maryland, College Park, MD
Abstract :
A low-noise readout array is proposed for use with high capacitance detectors. The readout array is composed of a preamplifier/amplifier chain. The signal processing chain is designed for use with CdZnTe gamma ray detectors employed by NASA for radiation detection. This approach employs correlated double sampling and capacitive matching to increase the signal-to-noise ratio (SNR). The readout array is custom designed to fit into one detector pixel. The preamplifier/amplifier chain is designed and fabricated in 0.13 mum CMOS8RF IBM technology. The readout array results show that the SNR is significantly improved compared to previous work done in this field.
Keywords :
CMOS integrated circuits; cadmium compounds; capacitive sensors; gamma-ray detection; low noise amplifiers; nuclear electronics; preamplifiers; radiation detection; readout electronics; semiconductor counters; CMOS8RF IBM technology; NASA; gamma ray detector; high capacitance sensor; low-noise signal processing; preamplifier; radiation detection; readout array; Array signal processing; Capacitance; Capacitive sensors; Gamma ray detectors; NASA; Preamplifiers; Process design; Sensor arrays; Signal design; Signal processing; Capacitive sensors; detectors; folded cascode amplifiers; preamplifier/amplifier chain;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2008.2006258
