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1、请问下图中两个TL783输出输入相连接是实现的什么功能？
2、请问U3的输出并联4个磁珠和ADJ相连的作用是啥？
再次请教下。U4是不是作为一个电压源使用，而U3作为一个恒流源来使用。可以这样理解吗
