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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。
This design unipolar bipolar input bipolar output voltage-controlled constant current source circuit is an important part of the neuroprotective therapy device, it is generated by the CPLD circuit pulse reversing polarity reversing switch composed of the transistor to select the output polarity . The V / I conversion factor, with load capacity (including the size of the output current and the size of the load resistance) can be achieved through the rational design of circuit parameters, experiments show that the constant current source circuit has good linearity and electrical safety, Very good to meet the requirements of neurological protection therapy device.