A low-noise bandgap reference voltage source with curvature correction

The design of a curvature-corrected bandgap reference using a linear combination of two base-emitter voltages with only one scaling factor is treated. Systematic design approaches are followed to obtain optimum performance with regard to noise, accuracy and power consumption. Further, the effect of the temperature dependency of the resistors on the performance of the bandgap reference is investigated. From simulation, using the parameters of the DIMES03 process, the output voltage is approximately 225 mV with an average temperature dependency of 3 ppm/°C in the range of 0°C to 120°C. Its total equivalent noise production at the output is approximately 20 nV/√Hz. The total current consumption is about 50 μA from a 1.2 V supply.