Patent ID: 6891358

Claim:
A bandgap voltage reference circuit having a supply voltage and adapted to provide an output voltage reference having a temperature curvature correction, comprising: an operational amplifier, having an inverting input node, a non-inverting input node, and an output node, the circuit including: a first set of circuit components coupled to the operational amplifier and adapted to generate a PTAT (Proportional to Absolute Temperature) current at the input nodes of the operational amplifier, a second set of circuit components provided in a feedback configuration and coupling the output node of the operational amplifier to the input nodes of the operational amplifier, the second set of circuit components adapted to generate a CTAT (Complementary to Absolute Temperature) current, and wherein the PTAT and CTAT currents generated by the first and the second set of circuit components are combined at the input nodes of the operational amplifier so as to provide for temperature curvature correction of the output voltage at the output node, thereby providing the voltage reference at an output voltage reference node.