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PCM1870(16位音频AD)采样时有时丢数据是怎么回事呢??

Other Parts Discussed in Thread: PCM1870

我用PCM1870(16位音频AD)采样电话中的声音,但采得的数据有时是没有的,是0,就丢数据了,但我用示波器看输入的信号,信号确实是输入了的,但输出就是没有啊???

详细的图片请见:www.ourdev.cn/.../bbs_content.jsp

请大虾指点,这是为什么呢?谢谢