Curvature correction of bipolar bandgap references

Details Curvature correction of bipolar bandgap references Curvature correction of bipolar bandgap references

1988-02-16

1989-02-28

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

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

323315, 323907, G05F 316

Patent

active

048089087

ABSTRACT:
A bipolar bandgap reference circuit employing three resistors of selected nominal resistance values and a method of trimming the values of two of the resistors to cancel the slope and curvature of output voltage due to thermal drift. One of the resistors provides a positive temperature coefficient to counter the temperature dependency of bipolar base-emitter characteristics; this resistor is not trimmed. The other two resistors are thin-film, low TC devices and are "trimmed" (i.e., adjusted) sequentially, to match calculated values intended to minimize the first and second derivatives of the bandgap cell output, as a function of temperature.

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Palmer, Dobkin, "Data Acquisition Circuits," 2/81, 1981 IEEE International Solid-State Circuits Conference, Digest of Technical Papers, pp. 58-59.
Meijer et al., "A New Curvature-Corrected Bandgap Reference", 12/82, IEEE Journal of Solid-State Circuits, vol. SC-17, No. 6, pp. 1139-1143.
Brokaw, "A Simple Three-Terminal IC Bandgap Reference", 1974, IEEE Journal of Solid-State Circuits, vol. SC-9, pp. 388-393.
Horowitz, Hill, The Art of Electronics, Cambridge University Press, pp. 195-199.
Song, Gray, "A Precision Curvature-Compensated CMOS Bandgap Reference", 1983, IEEE International Solid-State Circuits Conference, Digest of Technical Papers, pp. 240-241.

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