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TPA3110D2功放,无输入信号时,输出噪声问题

Other Parts Discussed in Thread: TPA3110D2

采用TPA3110D2做的功放板,无信号输入时,用示波器测试输出,有400mV(峰-峰值)的337Khz交流信号,详情参看附件,请帮忙解答,谢谢!