NPN band gap voltage reference

Details NPN band gap voltage reference NPN band gap voltage reference

1985-07-31

1986-12-02

Beha, Jr., William H.

Electricity: power supply or regulation systems

Self-regulating

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

330259, G05F 330

Patent

active

046267700

ABSTRACT:
A voltage reference circuit for providing a temperature compensated voltage at an output thereof comprise a pair of transistor operated at different current densities for producing a first and second voltages having complementary temperature coefficients and circuitry for combining the two voltages to produce the temperature compensated voltage. A pair of load resistors are connected to the collectors of the two transistors for sourcing currents thereto and a feedback circuit, including a differential amplifier coupled to the respective collectors, provides a feedback signal for adjusting the potential on the bases thereof to maintain different current densities in the two transistors. A bias circuit operates in conjunction with the differential amplifier to bias the same in a balanced operating state whenever the currents in the transistors are substantially equal.

REFERENCES:
patent: 3887863 (1975-06-01), Brokaw
patent: 4087758 (1978-05-01), Hareyama
patent: 4287439 (1981-09-01), Leuschner

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