Curvature correction circuit for a voltage reference

Details Curvature correction circuit for a voltage reference Curvature correction circuit for a voltage reference

1995-02-13

1995-12-26

Wong, Peter S.

Electricity: power supply or regulation systems

Self-regulating

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

323315, 323907, G05F 320

Patent

active

054790921

ABSTRACT:
A correction circuit (12) for providing an error correction voltage for a voltage reference (11). The voltage reference (11) provides a reference voltage within a predetermined temperature range. The voltage reference prior to correction has a peak magnitude at a temperature T.sub.0 within the predetermined temperature range. A first circuit (13) generates a correction current. Zero current is provided by the first circuit (13) at T.sub.0. A second circuit (14) receives the correction current and provides an output current that is uni-directional or of the same sense above and below T.sub.0. [Means responsive to t] The output current of the second circuit (14) generates a voltage across a resistor (28) that is [combined] added to the reference voltage above and below T.sub.0.

REFERENCES:
patent: 4325018 (1982-04-01), Schade, Jr.
patent: 4443753 (1984-04-01), McGlinchey
patent: 4447784 (1984-05-01), Dobkin
patent: 4618816 (1986-10-01), Monticelli
patent: 5220288 (1993-06-01), Brooks
Song et al., "A Precision Curvature-Compensated CMOS Bandgap Reference", IEEE Journal of Solid-State Circuits, vol. SC-18, No. 6, Dec. 1983, pp. 634-643.

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