Patent ID: 8446141

Claim:
A bandgap curvature correction circuit comprising: a first bipolar transistor having a first emitter, a first base and a first collector, said first emitter being coupled to ground; a second bipolar transistor having a second emitter, a second base and a second collector, said second emitter being coupled to ground, and wherein said first collector and said second collector are coupled together; a PTAT current source and a CTAT current sink coupled to said first base; a CTAT current source and a PTAT current sink coupled to said second base; current generator operative to develop an I PTAT output and an I CTAT output; and a I PTAT current mirror having an input coupled to said I PTAT output and having a plurality of I PTAT outputs and an I CTAT current mirror coupled to said I CTAT output and having a plurality of I CTAT outputs; wherein a first I PTAT output of said I PTAT current mirror is coupled to said first base; whereby an output signal at said first and second collectors is second order quadratic.