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用DAC0832设计一个使输出可以达到+-100mA的运算放大电路的若干问题

Other Parts Discussed in Thread: LM324

老师刚交的任务,之前没接触过电路设计。双极性放大用的是LM324,设计参考的数据手册,可以就是达不到,电流只能负的,不能正的。这是怎么回事?