Design of Embedded Low-Power High-Resolution Bandgap Reference
Zhou Dong · Dianzi qijian · 2007
This paper presents a CMOS self-bias cascode bandgap reference circuit.Small-area and low-power can be attained without any amplifiers,which is adopted to be embedded in low-power system.A novel power on reset circuit is used as start-up circuit for self-bias circuit.High resolution is implemented by base-current cancellation and base-resistor compensation.In 3.3 V UMC 0.25 μm standard CMOS process,Simulation indicates the output reference voltage is 1.208 3 V,the temperature coefficient is about 8×10-6/℃ from-20~80 ℃,and the power supply rejection ratio(PSRR) is-65.8 dB,the dissipation in the bandgap reference is less than 200 μW,output noise is 225 nV/2～(1/Hz)