Patent ID: 8106707
Filing Date: 2012-01-31
Classification: G05F,Y10S

Abstract:
1. A bandgap voltage reference circuit, comprising: a current generation stage configured to generate a proportional to absolute temperature (PTAT) current and a complementary to absolute temperature (CTAT) current; an output stage, coupled to the current generation stage, configured to combine the PTAT current and the CTAT current to generate a bandgap voltage reference; and a curvature correction circuit configured to generate a curvature correction current; wherein the curvature correction current substantially cancels a non-linear dependence on temperature of the bandgap voltage reference when applied to the bandgap voltage reference circuit, thereby generating a curvature-compensated bandgap voltage reference, and wherein the curvature correction current is applied within the current generation stage of the bandgap voltage reference circuit.