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运放放大电路中电阻精度对增益精度的影响



下图中电阻精度对增益精度的影响应该怎么计算?

谢谢!

我需要做一个测温设备,测温范围-20-+200℃,精度尽量在2摄氏度以内,1摄氏度更好,并且生产时不能校准。