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TPA3112D1

Other Parts Discussed in Thread: TPA3112D1

用TPA3112D1做音频功率放大器,输入约1V,3000KHZ的信号,从输出端测输出信号,频率基本没变,电压反而变为500mv。而且pvcc,avcc在4到6V左右信号不失真,再加大信号就失真。这是真么回事?