[{"title":"( 3 个子文件 384KB ) 绝对值电路文章全PDF","children":[{"title":"绝对值电路","children":[{"title":"提供绝对值的电路.pdf <span style='color:#111;'> 114.74KB </span>","children":null,"spread":false},{"title":"一种有源绝对值电路的缺陷分析和改进.pdf <span style='color:#111;'> 145.61KB </span>","children":null,"spread":false},{"title":"一种精密有缘绝对值电路的改进与应用.pdf <span style='color:#111;'> 132.64KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]