Circuit including bandgap reference

Details Circuit including bandgap reference Circuit including bandgap reference

1993-04-21

1994-11-22

Peckman, Kristine L.

Electricity: power supply or regulation systems

Self-regulating

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

323901, G05F 316, G05F 320

Patent

active

053672496

ABSTRACT:
An apparatus comprises a bandgap reference voltage circuit with first and second current legs and circuitry for generating a bandgap reference voltage. A transistor is coupled to the first current leg for selectively providing current to the first leg of the bandgap reference voltage circuit. A control circuit controls the transistor to turn the transistor on when an external voltage supply is initially applied to the apparatus to provide a start up current to the bandgap voltage reference source and senses an output voltage developed by the bandgap reference current source. The control circuit turns off the transistor responsive to the sensed developed voltage when the sensed developed voltage rises above a predetermined threshold.

REFERENCES:
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patent: 4419594 (1983-12-01), Gemmell et al.
patent: 4618816 (1986-10-01), Monticelli
patent: 4839535 (1989-06-01), Miller
patent: 4857823 (1989-08-01), Bitting
patent: 4890214 (1989-12-01), Yamamoto
patent: 5061862 (1991-10-01), Tamagawa
patent: 5081410 (1992-01-01), Wood
patent: 5084665 (1992-01-01), Dixon et al.
patent: 5087830 (1992-02-01), Cave et al.
U.S. Statutory Invention Registration No. H743 published on Feb. 6, 1990 (Bismark).
Temperature Compensated Current Reference, Research Disclosure, p. 419, May 1992.

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