【摘要】 设计了一种基于FPGA控制的AD采样电路.介绍了采样芯片内部各驱动信号作用及时序关系,详细分析了使用FPGA控制AD芯片实现时分复用的采样设计以及在FPGA中对采样结果进行的软件数字滤波、过零检测、离散傅里叶变换等数据处理过程,通过实验检验了这种采样电路的正确性和实用性.更多还原

【Abstract】 After introducing advantages of FPGA working as control circuit’sCPU in the distributed generation system, a AD sampling circuit based on FPGA control is designed according to sampling chip characteristics and sampling signal’s electrical characteristics of the control system. Drive signal function and temporal relations of the sampling chip is introduced. The software control strategy based on FPGA and date processing such as digital filter, the zero exam ination, discrete Fourier transfrom and so on are analyzed in datails. And then the experimental proved the sampling circuit is correct and practical.更多还原