Design of Low Temperature Drift and Low Power Consumption CMOS Bandgap Reference with Nonlinear Compensation

A nonlinear compensated bandgap reference based on current-mode is designed, The reference exhibits low temperature drift and low power consumption. The temperature-related nonlinear item in the VBF of a bipolar transistor can be compensated by adding a bipolar transistor and two resistors to conventional circuit. Implemented in CSMC 0.5 μm double poly triple metal CMOS technology, the proposed bandgap reference delivers an output voltage of 1.217 V with 3.3 V supply at 27℃. A temperature coefficient of 4.6 ppm/℃ from -40℃ to 125℃ and a line regulation of 1.6 mV/V from 2.6 V to 4 V are achieved after trimming. The power dissipation of the circuit is just 0.21 mW with 3.3 V supply.