Curvature Compensated Bandgap Voltage Reference

A method for generating a curvature-compensated bandgap voltage reference in a bandgap voltage reference circuit, comprising:

• generating a proportional to absolute temperature (PTAT) current and a complementary to absolute temperature (CTAT) current;
• generating a curvature correction current using the PTAT current and the CTAT current, wherein the curvature correction current substantially cancels a non-linear dependence on temperature of a bandgap voltage reference generated using the PTAT and the CTAT current;
• and
• combining the curvature correction current with the PTAT current and the CTAT current to generate the curvature-compensated bandgap voltage reference,
• wherein combining the curvature correction current with the PTAT current and the CTAT current comprises applying the curvature correction current at a current generation stage of the bandgap voltage reference circuit.

A method for generating a curvature-compensated bandgap voltage reference in a bandgap voltage reference circuit, comprising:

• generating a proportional to absolute temperature (PTAT) current and a complementary to absolute temperature (CTAT) current;
• generating a curvature correction current using the PTAT current and the CTAT current, wherein the curvature correction current exhibits a parabolic dependence on temperature substantially opposite to a parabolic dependence on temperature of a bandgap voltage reference generated using the PTAT and the CTAT current;
• and
• combining the curvature correction current with the PTAT current and the CTAT current to generate the curvature-compensated bandgap voltage reference.