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以DBS的治疗参数为依据,设计了外置式DBS的驱动电路。以单片机MSP430的PWM输出作为信号源,来控制D类放大器的开关,D类放大器的双端输出用以驱动初级线圈。通过实验可在模拟负载两端获得有效的单极性刺激脉冲,此脉冲会随着信号源的频率,占空比等参数的变化发生相应的变化,并且得到了3%的传输效率,证明了D类放大器用于外置式DBS的驱动电路的可行性。
DBS treatment parameters based on the design of the external DBS drive circuit. The output of the MSP430 PWM is used as a signal source to control the switching of the Class D amplifier. The double-ended output of the Class D amplifier is used to drive the primary. Through experiments, we can obtain effective unipolar stimulation pulse at both ends of the simulated load. The pulse will change correspondingly with the change of the signal frequency, duty cycle and other parameters, and the 3% transmission efficiency is obtained. Class D amplifier for external DBS drive circuit feasibility.