[{"title":"( 2 个子文件 141KB ) DDS波形合成技术中低通椭圆滤波器的设计.rar","children":[{"title":"0246、DDS波形合成技术中低通椭圆滤波器的设计","children":[{"title":"DDS波形合成技术中低通椭圆滤波器的设计.pdf <span style='color:#111;'> 132.49KB </span>","children":null,"spread":false},{"title":"使用者请先阅读说明.txt <span style='color:#111;'> 29.69KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]