提出了一种插值滤波器的设计与实现的新方法,并最终将其实现.该方法适合于过采样数模转换器.为减小芯片面积及设计复杂度,采用一种等同子滤波器级联设计方法,并对其改进.同时,提出了一种新型的等同子滤波器实现结构,进一步减少了芯片实现所需的硬件.测试结果表明,芯片达到了设计指标,节省了芯片面积,并显示出良好的噪声抑制性能.该数字插值滤波器已经被成功应用于一款过采样数模转换器. A new method of designing and implementing interpolation filter is proposed and implemented finally.The method is suitable for over-sampling DAC.In order to reduce the chip area and design complexity, an equivalent sub-filter stage The design method is improved and improved.At the same time, a new type of equivalent sub-filter is proposed to realize the structure and further reduce the hardware needed for chip implementation.The test results show that the chip achieves the design index, saves the chip area and Shows good noise suppression performance.The digital interpolation filter has been successfully applied to an oversampling digital-to-analog converter.