Band-gap voltage reference having an improved current mirror cir

Details Band-gap voltage reference having an improved current mirror cir Band-gap voltage reference having an improved current mirror cir

1981-05-11

1982-09-14

Shoop, William M.

Electricity: power supply or regulation systems

Self-regulating

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

307297, G05F 320

Patent

active

043497780

ABSTRACT:
The disclosed band-gap voltage reference circuit has an NPN feedback path for minimizing the value of the frequency compensation capacitor and for rejecting power supply line voltage variations. The feedback path includes a current mirror circuit which is comprised of a diode and a transistor which are connected between the collector electrodes of the transistors of a band-gap voltage reference cell. Balanced current supply circuits are also connected to the collector electrodes of the voltage reference cell transistors. The output voltage of the cell is utilized to clamp the voltages across the current supplies at substantially equal magnitudes so that voltage changes across the current supplies, due to line voltage variations for instance, do not deleteriously affect the regulating action of the voltage regulator cell.

REFERENCES:
patent: 3887863 (1975-06-01), Brokaw
patent: 4085359 (1978-04-01), Ahmed
patent: 4087758 (1978-05-01), Hareyama

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