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

Author(s): Huiming Zeng | Tingcun Wei | Bo Gan | Wu Gao

Journal: Journal of Signal and Information Processing
ISSN 2159-4465

Volume: 04;
Issue: 02;
Start page: 118;
Date: 2013;
Original page

Keywords: CZTdetector | Front-End Readout | CSP | Low-Noise

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
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