针对微流控芯片对紫外探测的性能要求,设计了探测器前置放大电路。通过理论分析和计算机仿真给出了光电探测器放大电路分析设计的一般方法,使得所设计的电路可同时满足稳定性和快速性的要求。经实验证实,所设计的电路可很好地满足微流控芯片对340 nm紫外探测的要求,并达到较高探测精度。

In order to satisfy the demand of good performance of detection at 340 nm ultraviolet light Spectrum, the authors design a preamplifier circuit of photoelectric detector. Moreover, through theoretical analysis and computer simulation the authors also propose a universal method of the designation of photoelectric detector′s preamplifier which can achieve high stability and high speed. Results of the experiment prove that the circuit we design can detect 340 nm ultraviolet light spectrum fairly well and achieve a fairly high precison.