最近,用28335的ADC采样500kHz的正弦信号,采样得到的幅值一直不正确,把频率降低到10kHz后才能接近输入信号,如图:
500kHZ的信号采样得到的幅值太小了只有1.2到1.3V,和输入信号对不上,请问这是什么原因造成的?
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