低温漂运放如何设计

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请问各位大神：
如何设计一个运放可以使得它的输入失调的温漂最小?如何实现
在网上查得：三极管作输入对管比MOS管作输入对管的温漂要小，请问谁有这两种类型输入失调电压温漂的具体数值?
谢谢！

Good question！ bipolar is the best for offset.
Due to the cmos, use the largest W/L and make it works in weak region like a weak bipolar device. what's more, WxL's size can be estimated by 3 Sigma to meet your SPEC.