神经功能保护治疗仪的压控恒流源电路的研制  

The Development of Voltage Controlled Current Source for Neuroprotective Treatment Instrument

作　　者：陆琳[1] 刘国传[1] 孙福军[1] 

机构地区：[1]中华人民共和国北京出入境检验检疫局,北京100026

出　　处：《生命科学仪器》2007年第2期37-39,共3页Life Science Instruments

基　　金：国家自然科学基金重点项目(39889001)资助

摘　　要：本文设计的单极性输入双极性输出压控恒流源电路是神经保护治疗仪的重要组成部分,它由CPLD电路产生极性相反的脉冲控制三极管组成的电流换向开关来选择输出极性。其V/I转换系数、带负载能力(包括输出电流的大小及负载电阻的大小范围)可以通过合理设计电路参数来实现,实验证明,该恒流源电路具有良好的线性和电气安全性,能很好的满足神经功能保护治疗仪的要求。A kind of VCCS（voltage controlled current source） with polar input and bipoar output powered by an polar power supply at the stage of output is developed, which was a key part of the instrument for neuroprotective treatment. Its output polarity is determined by the four NPN transistors controlled by two input pulses which is output of the CPLD circuit. The converting coefficient, the load capacity and the entailed output current of the VCCS can be achieved through changing the related coefficients. Experimental results proved that this type of VCCS has desirable linear character, high stability and safety, it can cater the requirements of the instrument for neuroprotective treatment.

关 键 词：神经功能保护治疗仪 压控恒流源 双极性输出 脑卒中 

分 类 号：TN41[电子电信—微电子学与固体电子学] TP33[自动化与计算机技术—计算机系统结构]