Bandgap voltage reference circuit

Details Bandgap voltage reference circuit Bandgap voltage reference circuit

1996-08-07

1997-11-11

Berhane, Adolf

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323315, G05F 326

Patent

active

056868235

ABSTRACT:
A bandgap voltage reference circuit includes a feedback controlled current mirror, a bandgap voltage generator, and a voltage comparator. The current mirror, in response to a feedback control signal from the voltage comparator, generates a controllable reference current. The bandgap voltage generator generates two reference voltages based upon conduction of the reference current from the current mirror through two PN diodes having different emitter areas. The voltage comparator compares the two reference voltages and generates the feedback control signal for the current mirror. Such a bandgap voltage reference circuit simultaneously generates a bandgap voltage reference and a current mirror reference while also being operable over a wide power supply voltage range and down to very low power supply voltage values.

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