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我想问一下 用户指南上的 ADS1299 EEG-FEFront-End Board Schematics电路中，vcc5v供电是用USB的供电方式吗？这样会不会噪声很大，电压不稳
5V不是使用的USB的Vbus：
The main power supplies (+5V, +3V and +1.8V) for the front-end board are supplied by the host board (MMB0) through connector J4
如果5v采样USB的供电方案，会不会噪声很大，影响芯片工作
