A 1.8 V CMOS Bandgap Voltage Reference With High Power Supply Rejection Ratio

A bandgap voltage reference has been proposed.We have provided improvements on speed,noise, temperature operating range issues compared with traditional bandgap reference design.Validity and accuracy of this scheme are verified by TSMC Process-Design-Kit-Based simulations.Simulation Results proved that this circuit can work at 1.5~1.8 V supply with power consumption less than 0.5 mW,the output reference voltage is 1.25 V,temperature coefficient is less than 1.8×10^-5℃and PSRR is-110 dB at DC.This cir- cuit can be widely applied to portable electronic designs.