一种新型的多道高精度电荷-电压幅度转换电路的设计  

A design of new multi-channel high precision charge-to-convert(QAC) circuit

作　　者：吴鸣[1,2] 苏弘[1] 马晓莉[1] 千奕[1,2] 董成富[1] 

机构地区：[1]中国科学院近代物理研究所,甘肃兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《核电子学与探测技术》2008年第4期690-694,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金资助项目(10675153)

摘　　要：本文介绍了一种新型的多道高精度的电荷-电压转换电路。该电路主要用于将光电倍增管输出的快电流脉冲信号转化为电压信号,并在控制信号作用下,将电压信号通过数据采集系统直接送入计算机进行处理。该电路用于处理快速的电流信号,其突出特点是转换速度快,电路结构简单,输入信号范围大(0-600pC),精度高,功耗低,在大型探测器前端电子学系统中有着广泛的应用前景。同时为制作该电路的ASIC模型进行了原理性研究。A new way and circuit designed for multi-channel high precision charge to amplitude conversion （QAC） is introduced in this paper. The new QAC circuit performs the conversion of fast current pulses generated by a photomultiplier tube （PMT） to voltage signals. The output voltage of the QAC circuit is directly fed to the multifunction DAQ. This system is optimal for fast current signals. The new circuit has features such as high precision, high speed of conversion, iess components, wide range of input （0- 600pC） and low cost. The circuit that we developed can be widely used to construct front-end read-out electronics of data acquisition system in measurement system of nuclear physics experiment with largecale detector array. And this design is useful for researching of the ASIC principle model of the circuit in the next step.

关 键 词：QAC 多道 高速 高精度 设计 ASIC模型 

分 类 号：TN78[电子电信—电路与系统] O4-33[理学—物理]