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Commercial off-the-shelf(COTS) ADCs(analog-to-digital converters) that are radiation-tolerant, high speed,high density and low power will be used in upgrading the LAr(liquid argon) calorimeter front end(FE) trigger readout electronics. Total ionization dose(TID) and single event effect(SEE) of the COTS ADCs should be characterized. In our initial TID test, 17 COTS ADCs from different manufacturers with dynamic range and sampling rate meeting requirements of the FE electronics were checked, and the ADS5272 of Texas Instruments(TI) was the best performer of all. Another interesting feature of ADS5272 is its 6.5 clock cycles latency, which is the shortest of all the 17 candidates. Based on the TID performance, we designed an SEE evaluation system for ADS5272, which allows us to further assess its radiation tolerance. In this paper, we present a detailed design of ADS5272 SEE evaluation system and show the effectiveness of this system while evaluating ADS5272 SEE characteristics in multiple irradiation tests. According to TID and SEE test results, ADS5272 was chosen to be implemented in the full-size LAr Trigger Digitizer Board(LTDB) demonstrator, which will be installed on ATLAS calorimeter during the 2014 Long Shutdown 1(LS1). 相似文献
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高精度短时间间隔测量系统 总被引:2,自引:0,他引:2
本文介绍了高精度短时间间隔测量系统建立的全过程,该系统短时间间隔测量的精度可达25ps。 相似文献
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CFG桩作为一种新型的复合地基形式,具有施工方便、成本低、技术相对成熟的应用优势,在建筑工程的地基加固处理中应用非常广泛。本文对CFG桩复合地基的施工技术要点及进行了具体分析,并针对施工过程中的常见问题,介绍了相应的防治措施。 相似文献
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基于模拟电路发生故障会导致电路信号小波包系数某种对应改变以及神经网络非线性逼近的特点,提出了一种基于小波包变换和神经网络的模拟电路故障诊断方法。先仿真得到正常和故障状态下的输出电压信号,然后对输出电压信号进行Haar小波包变换并提取小波包系数,并对各频段小波包系数变化值的能量进行归一化处理提取故障特征量,最后利用故障特征矢量训练神经网络确定模拟电路故障诊断的神经网络模型。仿真结果表明基于小波包变换和神经网络的模拟电路故障诊断方法取得了较好的效果。 相似文献
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基于VXI总线的时钟测量模块 总被引:2,自引:0,他引:2
介绍了一个时钟测量模块的设计,该模块是基于高速数据采集和数字信号的VXI测试模块、该模块的采样率高达500Msps,时间分辨为20ns。 相似文献
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基于模拟电路发生故障会导致电路信号小波包系数某种对应改变以及神经网络非线性逼近的特点,提出了一种基于小波包变换和神经网络的模拟电路故障诊断方法.先仿真得到正常和故障状态下的输出电压信号,然后对输出电压信号进行Haar小波包变换并提取小波包系数,并对各频段小波包系数变化值的能量进行归一化处理提取故障特征量,最后利用故障特征矢量训练神经网络确定模拟电路故障诊断的神经网络模型.仿真结果表明基于小波包变换和神经网络的模拟电路故障诊断方法取得了较好的效果. 相似文献
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