A 1.2-V 2.18-ppm/°C curvature-compensated CMOS bandgap reference

[摘要] A high-precision and low-temperature-coefficient bandgap voltage reference is proposed in 0.11 µm CMOS process. A temperature piecewise compensation circuit is added to a traditional bandgap reference to decrease the temperature coefficient (TC). The digital trimming technology has been used to solve the deviation of TC and output voltage resulting from process corner and mismatch. Simulation result shows that the bandgap reference achieves TC of 2.18 ppm/°C from -40°C to 125°C. Bandgap reference output voltage is 1.2 V with in the error of ±5 mV.

[学科分类] 电子、光学、磁材料

[关键词] bandgap voltage reference ,temperature piecewise compensation ,digital trimming ,and temperature coefficient