Patent ID: 8283974

Claim:
A fast start-up low-voltage bandgap reference voltage generator, comprising: a first current generator having a self-bias circuit, operative to provide a first current having a positive temperature coefficient, the self-bias circuit including: a first MOSFET having an output terminal for providing the first current; a first operational amplifier having an output terminal connected to a control terminal of the first MOSFET; a first BJT configured as a diode; a first resistor connected between a first input terminal of the first operational amplifier and the first BJT; a second resistor connected between the output terminal of the first MOSFET and the first input terminal of the first operational amplifier; a third resistor connected between the output terminal of the first MOSFET and a second input terminal of the first operational amplifier; and a second BJT configured as a diode, connected to the second input terminal of the first operational amplifier; a second current generator connected to the first current generator, operative to provide a second current having a negative temperature coefficient; a current summation circuit connected to the first and second current generators, operative to generate a summed current equal to a sum of the first and second currents; and an output resistor connected to the current summation circuit, receiving the summed current to generate an output voltage.