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设计思路是
但是测试后 LM2776输出为-0.7V TPS72325输出为0.6V 导致运放无法工作
原理图如下
AGND和GND单点接地
TPS72325通过可控电源输入-5v 电流为4mA
PCB：
想请问这样设计有问题嘛，如果需要改动有什么新的方案适合
