Design of multi-output CMOS bandgap reference voltage source with low cost
Tao Zhang · Modern Electronics Technique · 2012
Based on the traditional Brokaw bandgap reference source,a CMOS bandgap reference source structure of low-cost multi-path reference voltage output is presented,which adopts a self-biased structure and cascode current mirror instead of an amplifier.It decreases the demands of the resistance value,and reduces the cost,power consumption and noise greatly.The circuit was implemented with Hua Hong 1μm CMOS technology.Cadence simulation results show that its temperature coefficient is 23.6 ppm/℃ and the quiescent current is 24 μA at the range of-40~140 ℃,it can generate accurate reference voltages of 3 V,2 V,1 V and 0.15 V,has a advantage of fast start-up,and meets the design requirements of the most switching power supplies.