Band-gap voltage reference with curvature correction

Details Band-gap voltage reference with curvature correction Band-gap voltage reference with curvature correction

1979-01-17

1981-02-10

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

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

323907, G05F 158

Patent

active

042504457

ABSTRACT:
A temperature-compensated band-gap reference of the type employing two transistors operated at different current densities to develop a positive TC current. This current flows through a first resistor of nominal TC to develop a positive TC voltage which is connected in series with a negative TC voltage developed by the base-to-emitter voltage of a transistor, to produce a composite temperature compensated output voltage. The circuitry further includes a second resistor connected in series with the first resistor and having a positive TC to produce an additional compensating voltage having a temperature coefficient following a parabolic expression. This additional voltage, when connected with the other components of the output voltage, reduces the small residual inherent TC of the band-gap reference to provide a more stable reference source.

REFERENCES:
patent: 3976896 (1976-08-01), Ryder
patent: 4087758 (1978-05-01), Hareyama

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