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TPA6120A2

老师,您好!我在设计一款HI-FI播放器,使用TPA6120A2作为耳机放大芯片,用反向输入,请问是否可以设置放大倍数小于1吗?因为现在的播放器对噪声要求很严格,我现在增益设置为1倍,还是能够听得到一点噪声,所以我想降低点增益,比如到0.9倍。