Temperature compensation bandgap voltage reference and method

Details Temperature compensation bandgap voltage reference and method Temperature compensation bandgap voltage reference and method

1993-01-13

1994-10-04

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

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

3072966, 330256, 330289, 323907, G05F 316

Patent

active

053529731

ABSTRACT:
An output curvature correction is provided for a band-gap reference circuit that exhibits a temperature dependent output error in the form of k.sub.1 T - k.sub.2 Tln(k.sub.3 T) in the absence of the correction. A substantially constant collector current is driven through a correction transistor and used in connection with a proportional to absolute temperature (PTAT) transistor collector current in the uncorrected circuit. The difference between the base-emitter voltages for the two transistors has the form -k.sub.1 'T + k.sub.2 'ln(k.sub.3 'T.sub.). This voltage differential is scaled by an appropriate selection of resistor ratios and combined with the uncorrected circuit output to provide a corrected output that is substantially insensitive to temperature variations.

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Grebene, Bipolar and MOS Analog Integrated Circuit Design, John Wiley & Sons, 1984, pp. 206-209.
Fink et al., Ed., Electronics Engineers' Handbook, 3d ed., McGraw-Hill Book Co., 1989, pp. 8.48-8.50.

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