Research on Acquisition System of Multichannel Weak Photocurrent

摘要：

This paper make experiments and analyze with the acquisition system of multichannel weak photocurrent for Laser particle size analyzer. It is found using analog multiplexers directly switching multi-channel photocurrent will have a pulse spike. Through the analysis of photocurrent source output port, it was found that distributed capacitance will cause a pulse spike after switch closed. Then proposed the existence model of distributed capacitance in photocurrent source output port and the method of distributed capacitance discharge before switch in each channel. Experiments show that this design can significantly eliminate pulse spike, increase the speed of acquisition system.

关键词： laser particle size analyzer data acquisition photo-current source distributed capacitance pulse spike

作者: JIANG Hai-ying MOU Xiang-yang GAO Cheng-nan MA Yu-Liang

作者单位: School of Information Science and Engineering University of Jinan Jinan, China 250022

会议类型: 国际会议

会议名称: 2011 IEEE International Conference on Information and Education Technology(ICIET 2011)(2011年信息和教育技术国际会议)

会议地点: 贵阳

会议语种:英文

页码: 1-4

在线出版日期: 2011-01-26（万方平台首次上网日期，不代表论文的发表时间）