Design of CMOS Bandgap Voltage Reference with Low power and High PSRR
Yan Min · Journal of Hunan University · 2005
The design of CMOS bandgap voltage reference (BGR) with high power supply rejection ratio (PSRR) and low power dissipation was described .The cascade current mirror was used in the circuit, and the output of the OPAMP was used for the bias of itself and to drive the next stage. CMSC 0.6 μm 2 ploy n-well CMOS mixture signal model and Cadence Spectra tool were used for simulation. Simulation results showed that the output voltage varied lower than 1.6 mV(6.2×10- 6/℃) and 0.13 mV with a temperature range of - 50℃ to 150℃ and the supply voltage ranged from 4. 5 V to 5. 5 V respectively. The low frequency PSRR was higher than 75 dB and the maximum supply current was 10 μA with 5 V supply. This circuit will be applicable to low power dissipation, high stability integrated temperature sensors.