A sub-1 volt CMOS bandgap voltage reference based on body-driven technique

A sub-1 volt bandgap voltage reference is presented. The bandgap design utilizes the body-driven technique, which allows the bandgap voltage reference to operate at low voltages without requiring low threshold voltage devices. The technique provides larger input common-mode range, which is important in low voltage bandgap voltage reference circuits. The design features PMOS diodes to provide the negative and positive temperature coefficients. The complete design was simulated and laid out in AMI 0.6 /spl mu/m CMOS process. A minimum supply voltage of 0.8 V and a maximum current of 1.1 /spl mu/A were achieved. The design provides a temperature coefficient of 33 ppm//spl deg/C over a temperature range from 0 to 100/spl deg/C and occupies an area of 0.05 mm/sup 2/.