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Design of a Low-Noise Front-End Readout CSP-Shaper System for CZT Detectors
School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
- 1 School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
- 2 School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
- 3 School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
- 4 School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China
Journal of Signal and Information Processing·Volume 04 (2013)·Pages 118–122·Published 8 May 2013·DOI10.4236/jsip.2013.42016
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Abstract
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%.
KeywordsCZTdetectorFront-End ReadoutCSPLow-Noise
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