【摘要】 本文提出了一种用单片机和FPGA实现DDS信号源的实现方案。通过采用十进制累加器消除了二进制频率控制原理存在的固有误差,提高了信号源精度。通过对波形数据的量化减少了所需的存储容量。文中详细介绍了十进制频率控制原理,并例举了一种100Hz~200KHz,步进100Hz的DDS波形发生器的参数设计及实现。仿真结果表明,该设计简单合理,能够有效的消除二进制频率控制原理存在的误差,整个系统在保证频率精度的同时可快速获得输出波形。更多还原

【Abstract】 In this paper,a realization scheme of DDS signal generator with singlechip and FPGA is proposed.The inherent errors of binary frequency control principle are eliminated with a decimal phase accumulater,and the accuracy of signal generator is improved.Waveform data are quantized to reduce stored data volume.The principle of decimal frequency control is presented in details,and the parameters calculation and realization of a DDS signal generator of 100Hz to 200KHz with 100Hz frequency step are given.Simulation result shows that the design is simple and feasible,which can effectively eliminate errors of binary frequency control principle,and waveforms can be generated rapidly by the system as frequency accuracy is guaranteed.更多还原