Through cyclic pulse distributor and power amplifier, the pulses drive step-motor and let the speed of step-motor in agreement with a required sine function.

经脉冲分配器和功率放大后控制步进电机，使步进电机的转速符合所要求的正弦曲线。

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Consider that part of the drive signal required by the larger drive current, therefore, the design USES power-driven devices ULN2803 to drive.

考虑到部分驱动信号所要求的驱动电流较大，因此，本设计选用功率驱动器件uln2803来驱动。

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Consider that part of the drive signal required by the larger drive current, therefore, the design USES power-driven devices ULN2803 to drive.

考虑到部分驱动信号所要求的驱动电流较大，因此，本设计选用功率驱动器件uln2803来驱动。

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