Abstract:

A curvature-compensated bandgap reference voltage is designed based on a circuit that produces an I2PTAT current and a circuit works on CMOS Sub-threshold based on Chrt 0.35 μm CMOS model.Testing results of chip show that the bandgap reference operates at 1.2 volts,and has an average temperature coefficient less than2×10^-6/℃ between -20 to 120 ℃.The bandgap reference can be used in high resolution ADC,DAC,and soc chip.

Key words: bandgap reference;curvature correction;I²_PTAT