基于FPGA的DDS信号发生器的设计

Signal generators are widely used in the fields of scientific research and production practice. For traditional signal generator, kinds of signals can be got by oscillation and transformation of analog circuit. It is hard to get further development because of the limitations of anolog device and anolog circuit. DDS is a key digital technology, which has a high resolution, low noise and high stability. It is taking the place of traditional signal generator due to its advantages. This paper describes the basic principle of DDS, proposes the solution of DDS by FPGA. Improvements are given based on the tranditional DDS which allow DDS having higher output resolution and higher efficiency of memory utilization ratio.