High Performance CMOS Bandgap Voltage Reference Source with Multiple V/I Output

A high performance CMOS bandgap voltage reference with multiple V/I output using temperature compensation and differential negative feedback methods was proposed based on conventional CMOS bandgap reference.The circuit was implemented in 0.5 μm CMOS technology.HSPICE simulation results showed that it had a low temperature coefficient of 7.9×10-6/℃ from 0 ℃ to 100 ℃,and an output reference voltage of 1.233 V with discrepancy of only 1.8 mV at voltages from 1.9 V to 5.5 V.The voltage division circuit generates multiple V/I outputs,and the reference source outputs 4 μA of reference current,with temperature coefficient less than 12×10-6/℃ from-25 ℃ to 125 ℃.