A design of ultra-low-power bandgap reference base on the subthreshold region
Yang Sheng · Application of Electronic Technique · 2009
Based on the RFID tags chip's low power requirements,this paper designs an ultra-low-power bandgap reference, almost all the MOS of this circuit are working in sub threshold state.Simulation results under the spectre show that,a reference voltage of 1.8 V±0.001 V is obtained,in the range of power supply from 3 V to 7 V,and the temperature from -30℃to +120℃. The power supply rejection ratio is 69.5 dB,and the working current of this circuit maintain 1.5μ,A to 7μA.