Design of High Precision Bandgap Voltage Reference Based on Second-order Compensation Technique
Hui Hong · Journal of Hangzhou Dianzi University · 2008
A high precision,low temperature coefficient and low power bandgap reference with a start-up circuit is designed on the charter 0.35μm CMOS technology.The circuit is developed based on the conventional bandgap reference,and achieved second-order compensation using a temperature dependent resistor ratio generated by the different kinds of resistors.The simulation results show that the circuit delivers an output voltage of 1.149 V and achieves a temperature coefficient of 4.9 ppm/ °C over the range from-40 ℃to 120 ℃.The power consumption of the circuit is only 57uW.