Patent ID: 7282988

Claim:
A bandgap reference circuit, comprising: a first circuit section having a first plurality of bipolar transistors configured to generate a temperature-proportional voltage, the temperature-proportional voltage generated as a combination of multiple base-emitter voltages of at least some of the first plurality of bipolar transistors; a second circuit section having a second plurality of bipolar transistors configured to generate an inversely temperature-proportional voltage, the inversely temperature-proportional voltage generated as a combination of multiple base-emitter voltages of at least some of the second plurality of bipolar transistors; and wherein the first circuit section and the second circuit section are connected to each other in such a way that, at an output terminal of the bandgap reference circuit, a bandgap reference voltage is tapped as a combination of the temperature-proportional voltage of the first circuit section and the inversely temperature-proportional voltage of the second circuit section; wherein the first circuit section includes four bipolar transistors connected such that the temperature-proportional voltage is generated as the sum of the base-emitter voltages of first and second of the four bipolar transistors minus the base-emitter voltages of third and fourth of the four bipolar transistors; a collector of the first bipolar transistor of the first circuit section is connected to a base of the second bipolar transistor and a base of the third bipolar transistor of the first circuit section; an emitter of the second bipolar transistor of the first circuit section is connected to a base of the first bipolar transistor of the first circuit section; an emitter of the third bipolar transistor of the first circuit section is connected to a base of the fourth bipolar transistor of the first circuit section; and the temperature-proportional voltage is provided at an emitter of the fourth bipolar transistor of the first circuit section.