Patent ID: 8089260

Claim:
A bandgap reference circuit for generating an output reference voltage, comprising: a first reference signal generator, having an output terminal coupled to a first node, for generating a first reference signal proportional to absolute temperature (PTAT) from the output terminal; a first impedance; a second reference signal generator, coupled to the first impedance in series, for generating a second reference signal complementary to absolute temperature (CTAT) according to the first reference signal; and a second impedance, wherein the second impedance, the serially-coupled first impedance and second reference signal generator, and the first reference signal generator are coupled in parallel between the first node and a second node; the bandgap reference circuit outputs the output reference voltage through the first node and the second node; wherein the first reference signal compensates for the second reference signal such that the output reference voltage is substantially independent of temperature and power supply, and the output reference signal is substantially determined by the first impedance, the second impedance and a bandgap voltage value.