J
jiangwp
Guest
Genneraly, the two bipolar PNP follwer is formed to deduce the effect of OPAMP offset to the output of BandGap.
But the current gain β of local PNP(in cmos process) is relatively small, therefore, the first PNP base current is inserting the second PNP emitter, so this causes the offset of output of BandGap.
Maybe there is some equations to present the relation between them.
I have derived it.
But i do not know that whether it is right or not.
someone can give it to verify me answer.
But the current gain β of local PNP(in cmos process) is relatively small, therefore, the first PNP base current is inserting the second PNP emitter, so this causes the offset of output of BandGap.
Maybe there is some equations to present the relation between them.
I have derived it.
But i do not know that whether it is right or not.
someone can give it to verify me answer.