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j检查下shutdown引脚是否低电平,另外,按照您的解法,IN-接地,In+为0~1.5V脉冲,那么IN+一直大于IN-,输出应该一直高电平才对。shaohua zhang 说:-IN 接地,+IN接入1.5V正弦脉冲波。+5V输入,引脚电平正常,OUT一直低��平没有输出,OUT加入上拉电阻后变为高电平,觉着芯片一直没有工作啊