Design of a Low-Noise Front-End Readout CSP-Shaper System for CZT Detectors


This paper describes a low-noise front-end readout circuit for CZT detectors based on TSMC 0.35 um mixed-single CMOS technology; mainly analyzes the noise model of the detector-preamplifier and presents the low-noise circuit schematic of charge sensitive preamplifier and shaper. Considering the parasitical influences, the circuit and layout-design are optimized to reduce noise. The preliminary simulation results show that, the equivalent noise charge (ENC) is 74 e (rms), noise slope is 9 e/pF, power consumption is 2 mW, and non-linearity is <3%.

Share and Cite:

H. Zeng, T. Wei, B. Gan and W. Gao, "Design of a Low-Noise Front-End Readout CSP-Shaper System for CZT Detectors," Journal of Signal and Information Processing, Vol. 4 No. 2, 2013, pp. 118-122. doi: 10.4236/jsip.2013.42016.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] K. Iniewski and W. Davros, “Medical Imaging Principles, Detectors, and Electronics,” Medical Physics, Vol. 36, No. 11, 2009, p. 5374. doi:10.1118/1.3246610
[2] T. Takahashi and S. Watanabe, “Recent Progress in CdTe and CdZnTe Detectors,” IEEE Transactions on Nuclear Science, Vol. 48, No. 4, 2001, pp. 950-959. doi:10.1109/23.958705
[3] M. Beikahmadi and S. Mirabbasi, “A Low-Power LowNoise CMOS Charge-Sensitive Amplifier for Capacitive Detectors,” New Circuits and Systems Conference (NEWCAS), Bordeaux, August 2011, pp. 450-453.
[4] C. Fiorini and M. Porro, “DRAGO Chip: A Low-Noise CMOS Preamplifier Shaper for Silicon Detectors with Integrated Front-End JFET,” IEEE Transactions on Nuclear Science, Vol. 52, No. 5, 2005, pp. 1647-1653.
[5] T. Kishishta, H. Ikeda, T. Kiyuna, et al., “Development of a Low-Noise Analog Front-End ASIC for CdTe Detectors,” 2007 IEEE Nuclear Science Symposium Conference Record, Honolulu, 26 October 2007-3 November 2007, pp. 1992-1996. doi:10.1109/NSSMIC.2007.4436544
[6] Y. Hu, W. Dulinski, et al., “Design of a Low Noise, Self-Triggered, Monolithic Preamplifier Dedicated to Silicon Trackers and X-B Imaging,” Nuclear Instruments and Methods in Physics Research A, Vol. 361, No. 3, 1995, pp. 568-573.
[7] Y. Hu, J. L. Solere, et al., “Design and Perdormance of a Low-Noise Low-Power Consumption CMOS Charge Amplifier for Capacitive Detectors,” IEEE Transactions on Nuclear Science, Vol. 45, No. 1, 1998, pp. 119-123.

Copyright © 2023 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.