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关于DA输出电压 噪声问题

         一个电压信号,通过电压跟随器输出,但是由于运放电源接了负载噪声比较大,所以导致电压信号经过运放电压跟随输出噪声也比较大,请问怎么解决好。谢谢

电源电压12V  电压信号范围0-5V。