DDS芯片AD9852的DEMO板完整原理图（内含原理图为Protel 99格式+DXP格式）便于大家直接学习该芯片的使用方法而不必无数次的重复劳动，此外附加了自制PCB样板一块（Protel 99格式），可供参考。-DDS chip AD9852 complete the DEMO board schematic diagram (including the principle of photo shows Protel 99 format+ DXP format) to facilitate direct everyone to learn to use the chip without having to numerous duplication of effort, also added a home-made PCB model (Protel 99 format) for reference.