Flicker noise free bandgap reference voltage generator circuit

A circuit, comprising:

• a current mirroring circuit including a first bipolar transistor, a second bipolar transistor and a third bipolar transistor, wherein an output voltage is generated at an output node in response to a third mirrored current output by the third bipolar transistor;
• a bandgap core circuit including:
• a fourth bipolar transistor and a fifth bipolar transistor coupled, respectively, to the first and second bipolar transistors and configured to use a difference in base to emitter voltages of the fourth and fifth bipolar transistors to generate a complementary to absolute temperature (CTAT) voltage and a proportional to absolute temperature (PTAT) voltage from first and second mirrored currents output by the first and second bipolar transistors, respectively;
• and
• a transconductance amplification circuit having a differential input coupled, respectively, to the first and second bipolar transistors to receive a base current, and an output coupled to apply a bias current to base terminals of the first, second and third bipolar transistors;
• wherein the transconductance amplification circuit comprises a sixth bipolar transistor in diode connected configuration coupled to a seventh bipolar transistor with a base terminal at the differential input receiving the base current;
• and
• a current sink circuit configured to sink a compensation current from the output node corresponding to the base current at the base terminal of the seventh bipolar transistor of the transconductance amplification circuit.