文献类型：期刊文献

中文题名：生命科学仪器中光电倍增管偏置电路分压精度的提高

英文题名：Improvement in the voltage dividing precision of a Photomultiplier Tube biasing circuit

作者：王慧锋[1];黄道[1]

机构：[1]华东理工大学信息科学与工程学院,上海市200237

年份：2007

卷号：11

期号：26

起止页码：5157

中文期刊名：中国组织工程研究与临床康复

外文期刊名：Journal of Clinical Rehabilitative Tissue Engineering Research

收录：北大核心:【北大核心2004】；CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：光电倍增管;光电倍增管;偏置电路;分压器

摘要：目的:分析光电倍增管电压偏置电路对光电倍增管性能的影响,并采取相应措施提高光电倍增管电压偏置电路的精度,以改善光电倍增管的性能。方法:在电阻型光电路倍增管偏置电的基础上,增加双极型晶体管或场效应晶体管构成有源光电倍增管偏置电路;并采用可调恒流技术,以解决温度对电路的影响。结果:在阳极电流为50μA,电阻型光电倍增管偏置电路的线性偏离度已达40%,而用双极性晶体管或场效应晶体管的有源偏置电路的线性偏离度分别为≤7%,≤3%,采用可调恒流技术后,电路的线性偏离度≤1%;如果要求阳极电流为100μA时线性偏离度≤1%时,电阻型光电倍增管偏置电路的功耗为11W,而用双极性晶体管或场效应晶体管的有源偏置电路的总功耗分别在0.18～0.95W,0.12～0.75W。结论:采用场效应晶体管的有源偏置电路显著提高了偏置电压的线性度和稳定性,减少了功耗和体积,加入可调恒流技术后,进一步降低偏置电路的线性偏置度,从而改善了光电倍增管的性能。
AIM： To analyze the influence of Photomultiplier Tube （PMT） voltage biasing circuit on the performance of PMT, and to take corresponding measures for elevating the accuracy of PMT voltage biasing circuit accuracy to improve the performance of PMT. METHODS： On the basis of PMT passive voltage biasing circuit, Bipolar Transistor or Field Effect Transistor （FET） were used. Additionally, ＂adjustable constant current technology＂ was adopted to avoid the effect of temperature on circuit. RESULTS： If anode current was 50 μA, the linear deviation of the PMT passive voltage biasing circuit had reached 40%. On the other hand, the linear deviations of the active voltage biasing circuit with Bipolar Transistor or FET were at most 7%, and at most 3% respectively. With the use of ＂adjustable constant current technology＂, the linear deviation was at most 1%. If anode current was 100 μA and linear deviation was at most 1%, the power consumption of the PMT passive voltage biasing circuit was 11 W, the power consumptions of the PMT active voltage biasing circuit with Bipolar Transistor or FET were between 0.18 W and 0.95 W, between 0.12 W and 0.75 W respectively. CONCLUSION： With the use of FET in the PMT active voltage biasing circuit, the linearity and stability are significantly improved and the power consumption and the volume of equipment are reduced. The linear deviation is reduced further and the performance of PMT is improved by adding the ＂adjustable constant current technology＂.