Patent ID: 6989708

Claim:
A bandgap reference voltage generator for providing a bandgap reference voltage VBG in a circuit having a supply voltage VDD and a ground, the bandgap voltage reference generator comprising: a first current mirror circuit operatively coupled to the supply voltage VDD; a bandgap reference current circuit operatively coupled between the first current mirror and ground, the bandgap reference circuit adapted for deriving a bandgap current proportional to absolute temperature, IPTAT; a second current mirror circuit for mirroring the IPTAT; and a control circuit for summing the mirrored currents and modulating a bandgap reference voltage output, VBG, at an output node, wherein the first current mirror further comprises: a first field-effect transistor having a source coupled to the supply voltage VDD, a drain coupled to the bandgap reference circuit, and a gate coupled to the drain; and a second field-effect transistor having a source coupled to the supply voltage VDD, a drain coupled to the second current mirror, and a gate coupled to the gate of the first field-effect transistor.