我最近阅读tps7a90 Datasheet时,对第6页 figure1~figure4有点疑惑。
如下图,对于低频10Hz~100Hz之间,figure1和figure2测试结果显示这段频率内,PSRR曲线是平直的。但是figure3和figure4测试结果显示这段频率内,PSRR曲线是斜的,频率越低,PSRR越低,这是为什么?
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Hi
推荐你看看这篇文章: www.ti.com/.../slyt202.pdf