Bandgap 新手求教

大家好，最近在研究bandgap的trim问题。
发现有些书里，trim是针对温度的，我就不理解了。bandgap应该在设计的时候，就对温度进行了补偿了呀，所以才有一阶、二阶。补偿。
请教一下大家。

Most likely the silicon result would not behaved as what you expected in your design/simulation, especially over process conrer cases.

Trimming is not only for deviationdue to temp but also corner and other unideal factor