A fast start-up low-voltage bandgap voltage reference circuit is disclosed. The
bandgap voltage reference circuit includes: a first current generator, which is
implemented by a self-bias unit and a current mirror for generating a first reference
current with positive temperature coefficient; a second current generator, which
is connected to a point with negative temperature coefficient in the first current
generator to generate a second reference current with negative temperature coefficient;
and a resistor for converting the first reference current and the second reference
current into a low-voltage bandgap voltage independent of temperature. Because
the bandgap voltage reference circuit of the invention uses the resistor to convert
the first reference current and the second reference current into voltage, the
circuit can provide low-voltage bandgap voltage.
