Curvature Corrected Bandgap
(only Spice verified)
NPN based curvature corrected bandgap.
Original design,
M. Gunawan, G. Meijer, J. Fonderie, and H. Huijsing, “A curvature-corrected low-voltage bandgap reference.
Replace the PNP by PMOS since I don't have good PNP. There are two choices of resistors. One is zero TC1 resistor and the other is 1K poly with ~-1000ppm TC1.
See the differences. Not sure if the kink is real or just Spice model issue. The working rail is about 2V.
Original design,
M. Gunawan, G. Meijer, J. Fonderie, and H. Huijsing, “A curvature-corrected low-voltage bandgap reference.
Replace the PNP by PMOS since I don't have good PNP. There are two choices of resistors. One is zero TC1 resistor and the other is 1K poly with ~-1000ppm TC1.
See the differences. Not sure if the kink is real or just Spice model issue. The working rail is about 2V.
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