A Novel Low-Voltage CMOS Voltage Reference Circuit Insensitive to VDD and Temperature Variations

A novel low-voltage CMOS voltage reference circuit insensitive to VDD and temperature variations is proposed in this paper. A reference voltage with low temperature dependency is achieved by canceling the negative temperature dependency of MOSFET’s threshold voltage by the PTAT voltage. The output reference voltage of 510㎷ is realized and its temperature dependency is 39ppm/℃ in the temperature range from -20℃ to 80℃. The proposed circuit can work at the voltage supply of 0.9V.