计量学报2016，Vol.37Issue(z1)：39-43,5.DOI:10.3969/j.issn.1000-1158.2016.z1.09
高灵敏度测氡脉冲电离室前置放大器设计
Design of Pre-amplifier for High Sensitivity Radon Pulse Ionization Chamber
黄叶 1李福生 2梁珺成 1周倩倩 2杨志杰 1曾卫华 2贺海江 2张明 3刘皓然3
作者信息
- 1. 东华理工大学,江西南昌330013
- 2. 中国计量科学研究院,北京100029
- 3. 中国地质大学,北京100083
- 折叠
摘要
Abstract
Aiming at the problem that the mainstream commercial radon instrument has low accuracy when measuring low radon concentration.For output signal of a new ion pulse ionization chamber,a highly sensitive preamplifier circuit based on integrated operational amplifier TL071 is designed.The preamplifier consists of current and voltage conversion circuit,amplifying circuit and CR-RC integral-differential filter forming circuit with the same time constant.Using Multisim 10 to its gain,amplitude-frequency characteristics,distortion,SNR and input impedance performance simulation and testing,the results show that the preamplifier converts the pA level signal into a voltage signal and amplifies it to V level,and the input impedance is about 105 MΩ.The distortion can reach 0％ and the SNR can reach 100 dB.关键词
计量学/离子脉冲电离室/前置放大器/电流电压转换/积分微分电路/滤波成形/Multisim仿真Key words
metrology/ion pulsed ionization chamber/pre-amplifier/current and voltage conversion/integral-differential circuit/filter forming/Multisim emulation分类
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黄叶,李福生,梁珺成,周倩倩,杨志杰,曾卫华,贺海江,张明,刘皓然..高灵敏度测氡脉冲电离室前置放大器设计[J].计量学报,2016,37(z1):39-43,5.
