我用DSP28335后接DAC7724产生三相正弦波信号,作为三相逆变器的电压基准。逆变器轻载的时候运行正常,随负载加重DAC7724的输出受到干扰,出现一段负的最大值,如图所示。B、C相单独工作也都是可以的,只有A相工作才会产生此现象。
有同事说DA芯片容易受到干扰。请问有没有人遇到过类似现象?怎么解决?
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