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TPA6304-Q1: 测试底噪比较大,应该如何优化

Part Number: TPA6304-Q1

在测试TPA6304的信噪比时发现,输出1Vrms时的信噪比只有74dB(要求>80dB),底噪在220uV6304SPEC60uV),麻烦提供优化建议,谢谢。附件是测试报告,PCB和原理图。

AMP LAYOUT.docxAMP.pdfTPA6304-.docx