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我的问题如下，具体见附件 1. 随着PGA音量的抬高是不是同时将底噪也进行了放大？ 2. 这样的放大是不是芯片固有的现象？能否进一步降低频谱底噪？
1.是这样的，底噪确实会被放大
2.您现在测试出来的底噪有多大？
