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

Huiming Zeng, Tingcun Wei, Bo Gan, Wu Gao

School of Computer Science and Technology, Northwestern Polytechnical University, Xi’an, China.

DOI: 10.4236/jsip.2013.42016                

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%.

Keywords

CZTdetector; Front-End Readout; CSP; Low-Noise

Conflicts of Interest

The authors declare no conflicts of interest.

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