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首页> 外文期刊>Microelectronics journal >Design and and performance of a 16-channel radiation-hardened low-noise front-end readout ASIC for CZT-based hard X-ray imager
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Design and and performance of a 16-channel radiation-hardened low-noise front-end readout ASIC for CZT-based hard X-ray imager

机译：用于基于CZT的硬X射线成像仪的16通道辐射硬化低噪声前端读出ASIC的设计和性能

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摘要

This paper presents the design and the performance of a low-noise front-end readout application specific integrated circuit (ASIC) dedicated to CZT detectors for a hard X-ray imager. A cascode amplifier based on split-let topology is proposed to realize the charge-sensitive amplifier (CSA) for the sake of a single positive power supply. A leakage-current-compensation circuit is added to suppress the maximum leakage current of 10 nA. The output of the CSA is connected to a CR-RC shaper. In the timing branch, the output of the CSA is followed by a fast shaper for the trigger acquisition. A digital monostable circuit is designed to adjust the delay of trigger signals so that the peak value of the shaped voltage signals can be tracked. The sampled voltages are stored into an analog memory. A radiation-hardened-by-design methodology is proposed to achieve the radiation hardness for the space applications. A 16-channel front-end readout ASIC is designed and implemented in TSMC 0.35 mu m CMOS process. The die size is 2.12 mm x 4.60 mm. The input range of the ASIC is from 4k e(-) to 140k e(-), which is suitable for the detection of the gamma ray from 20 keV to 650 keV. The ASIC has been tested. The gain of the readout channel is typically 81.4 mV/fC. The equivalent noise charge (ENC) is 50 e(-) at zero farad plus 18 e(-) per picofarad. The nonlinearity is less than 3%. The crosstalk is less than 2%. The static power dissipation is about 16.5 mW plus 10.6 mW/channel. In addition, the tested results show that the proposed ASIC can resist larger than 200 krad(Si) TID irradiation. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本文介绍了专用于硬X射线成像仪CZT检测器的低噪声前端读出专用集成电路（ASIC）的设计和性能。提出了一种基于分裂拓扑的共源共栅放大器，以实现单个正电源的电荷敏感放大器（CSA）。添加了漏电流补偿电路以将最大漏电流抑制为10 nA。 CSA的输出连接到CR-RC整形器。在时序分支中，CSA的输出之后是用于触发获取的快速整形器。设计数字单稳态电路来调节触发信号的延迟，以便可以跟踪整形电压信号的峰值。采样电压存储在模拟存储器中。提出了一种通过设计进行辐射硬化的方法，以实现空间应用的辐射硬度。在台积电0.35微米CMOS工艺中设计并实现了16通道前端读出ASIC。模具尺寸为2.12毫米x 4.60毫米。 ASIC的输入范围为4k e（-）至140k e（-），适用于检测20 keV至650 keV的伽马射线。 ASIC已经过测试。读出通道的增益通常为81.4 mV / fC。零法拉时的等效噪声电荷（ENC）为50 e（-），每微微法拉等于18 e（-）。非线性度小于3％。串扰小于2％。静态功耗约为16.5 mW，加上每通道10.6 mW。此外，测试结果表明，所提出的ASIC可以抵抗大于200 krad（Si）的TID辐射。 （C）2015 Elsevier Ltd.保留所有权利。

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  • 来源
    《Microelectronics journal》 |2016年第2期|87-94|共8页
  • 作者

    Gao W.; Li X.; Liu H.; Hu Y.;

  • 作者单位

    Northwestern Polytech Univ, Sch Comp Sci & Technol, Inst Microelect, 127 Youyixi Rd, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, Sch Comp Sci & Technol, Inst Microelect, 127 Youyixi Rd, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, Sch Comp Sci & Technol, Inst Microelect, 127 Youyixi Rd, Xian 710072, Shaanxi, Peoples R China;

    UDS, CNRS, IPHC, 23 Rue Loess BP28, F-67037 Strasbourg 2, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Front-end electronics; CZT detector; Front-end readout ASIC; Hard X-ray imager;

    机译：前端电子设备;CZT检测器;前端读出ASIC;硬X射线成像仪;

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