The Design Of IF Signal Generator Based On FPGA And high speed DA

In response to the limitation of FPGA working clock frequency not being too high in practical engineering, it is difficult for FPGA to directly generate high-frequency signals, a method for combining high-speed D/A and FPGA to generate signals has been proposed,This method extracts high-frequency signals into multiple low-frequency signals, and generates multiple parallel signals using FPGA. Then, high-speed DA is used to complete the parallel serial conversion of the multiple signals, and the multiple parallel signals generated by FPGA are synthesized into one high-speed signal analog output. In this paper, the calculation method of the frequency control word and phase initial phase of FPGA generating multiple parallel signals, and the structural model of FPGA + DA generating high-frequency signals, After simulation analysis and practical implementation, it has been proven that this method is completely feasible and has strong engineering practical significance and application prospects.