Tunable voltage reference circuit to provide an output voltage w

Details Tunable voltage reference circuit to provide an output voltage w Tunable voltage reference circuit to provide an output voltage w

1991-10-29

1994-01-25

Voeltz, Emanuel T.

Electricity: power supply or regulation systems

Self-regulating

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

323314, 323907, 3072961, 3072966, 3072968, G05F 324

Patent

active

052819060

ABSTRACT:
A voltage reference circuit for providing a predetermined reference voltage at an output terminal which is independent of variation in supply voltage. The voltage reference circuit includes first and second semiconductor elements coupled between supply voltage terminals of a power supply, with the first and second semiconductor elements being connected in series with first and second impedances. The reference voltage is provided at the common terminal of the first and second impedances. The temperature coefficient of voltages produced by the first and second semiconductor elements in combination with the first and second impedances provide a reference voltage with a predetermined temperature coefficient. A tuning circuit is also included to permit fine adjustment of voltage level changes due to process variations.

REFERENCES:
patent: 4833342 (1989-05-01), Kiryu et al.
patent: 5109187 (1992-04-01), Guliani
Article entitled "A Floating CMOS Bandgap Reference Voltage for Differential Applications", by M. Ferro et al., published in the IEEE Journal of Solid State Circuits, vol. SC-24, pp. 690-697.
Article entitled "A New NMOS Temperature-Stable Voltage Reference" by R. Blauschild et al., published in the IEEE Journal of Solid-State Circuits, vol. SC-13, pp. 767-773, Dec. 1978.
Pp. 736-737 from the book entitled Analysis and Design of Analog Integrated Circuits, second edition, by P. R. Gray and R. E. Meyer, published by John Wiley and Sons, New York, N.Y., 1984.

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