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US 4,064,448 AGranted
Band gap voltage regulator circuit including a merged reference voltage source and error amplifier
AssigneeFairchild Camera and Instrument Corporation
InventorFred L. Eatock
Life of this patent
Estimating the term…
Abstract
An improved circuit for a band gap voltage regulator is provided with a merged reference voltage source and error amplifier wherein the circuit operates simultaneously as a generator of the internal reference voltage as well as the small signal error amplifier for comparing a fraction of the output voltage to the reference voltage.
Claims3
In a band gap voltage regulator wherein an internal reference voltage source and error amplifier are merged the improved circuit which comprises:
- a first resistor;
- a second resistor;
- a first transistor;
- a second transistor, the base of said second transistor being electrically connected to the collector of said first transistor and to the base of said first transistor, the emitter of said second transistor being electrically connected to the emitter of said first transistor through sid first resistor;
- a third transistor whose emitter is electrically connected to the collector of said second transistor;
- and
- a forth transistor whose emitter is electrically connected to the base of said third transistor and whose emitter is electrically connected through said second resistor to the collector of said first transistor.
4 more elements
Dependencies are inferred from the claim text.