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请问：这个放大器的作用是什么呢？GND和GND_A之间的差动信号放大以后就可以得到相应的相电流 IA吗？
对采样电流进行信号放大。Vout = 1.65+I*Rshunt*Gain,gain就是放大器增益~
采用下桥臂Rshunt的方式检测到的电流，不是真正的相电流，需要做相应的窗口判断决定采用哪两项电流作为电机相电流~
多谢
