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电源精度



老师们好,我想需要一个9.5V的线性稳压,输入是12V,图中有三种电路,都还没有测试过,想请问一下,这几种是否都成立,哪一种电路输出精度高些,比较稳定,还有就是和TPS7A4901做出的线性稳压比较,精度上差多少?谢谢!