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OPA344: OPA344用于单端转差分失真

Part Number: OPA344

dear TI :

用OPA344将音频信号转为差分,参考如下电路: ,实际工作电压为5V,参考电压为2.5V,
现在实测,信号波形失真,且有概率出现一半波形没有的情况。