Inflection point correction for voltage references

A self-calibration technique that corrects the inflection point of the reference voltage curvature is presented. This technique employs lattice-heating effect of semiconductor to change the operating temperature of the circuit. By sampling the reference voltage at two temperatures, the inflection point of the reference voltage curvature is first estimated and then corrected if necessary. The implementation was verified through simulation, and the results are attractive for achieving optimal first-order voltage references.