Reference voltage circuit having low temperature coefficient sui

Details Reference voltage circuit having low temperature coefficient sui Reference voltage circuit having low temperature coefficient sui

1990-03-23

1991-02-19

Stephan, Steven L.

Electricity: power supply or regulation systems

Self-regulating

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

323907, 3072968, G05F 320

Patent

active

049947290

ABSTRACT:
A solid-state electrical circuit (10) includes a reference diode (D1) and multiple diodes (D3-D14) connected in electrical series to produce a substantially temperature-invariant output reference voltage. The reference diode is characterized by a forward voltage drop (V.sub.D1) that changes in accordance with a temperature coefficient. The multiple diodes, which have selected junction areas (A1 and A2) and receive one of two different forward-bias currents (I1 and I2), are electrically interconnected to establish a net voltage (.DELTA.V.sub.Di) that equals the forward voltage drop across the reference diode and changes in accordance with a net temperature coefficient of substantially equal magnitude but of opposite sign to the temperature coefficient of the reference diode. The output reference voltage equals the sum of the forward voltage drop across the reference diode and the net voltage established by the multiple diodes. The output reference voltage is substantially unaffected by changes in temperature because voltage changes resulting from the two temperature coefficients of opposite sign effectively offset each other. The invention is particularly suitable for implementation in GaAs IC technology.

REFERENCES:
patent: 4636710 (1987-01-01), Stanojevic
patent: 4677369 (1987-06-01), Bowers et al.
patent: 4686451 (1987-08-01), Li
patent: 4714872 (1987-12-01), Traa
Crauwels, G. L., IBM Technical Disclosure Bulletin, vol. 19, No. 10, Mar. 1977, pp. 3782-3783.

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