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这是实验套件的双极性输出电路。求解他的双极性是怎么输出的?LMP7701的反相输入端接3V VCC 是怎么回事?
这是预偏置。
当+输入为3.3/2V时,输出为0V;2脚电压和3脚相等。
当DAC7311输出3.3V时,放大器输出3.3V
当DAC输出0V时,放大器输出-3.3V。
既可输出正电压,又可输出负电压,这就是双极性输出
谢谢哈!
多谢了!