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US 5,036,269 AGranted
Voltage stabilizer with a very low voltage drop designed to withstand high voltage transients
AssigneeSGS-Thomson Microelectronics S.A.
InventorsBruno Murari, Marco Morelli, Giampietro Maggioni
Life of this patent
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Abstract
A voltage stabilizer with a very low voltage drop includes a series voltage regulator circuit having a first PNP transistor connected to an input terminal of the stabilizer via a second PNP transistor and being connected to ground via a capacitor. The stabilizer has biasing and switching circuits disposed between the input terminal thereof, a base terminal of the second transistor and ground.
Claims5
A monolithically integratable voltage stabilizer comprising:
- a first bipolar transistor of a first type of conductivity having an emitter terminal which is connected to ground via a capacitor, and having a collector terminal which forms an output terminal of the stabilizer, and having a base terminal;
- a differential amplifier having an output terminal which is connected to said base terminal of said first bipolar transistor and having a first input terminal which is connected to a voltage divider connected between said output terminal of the stabilizer and ground, and having a second input terminal which is connected to a first voltage reference;
- a second bipolar transistor of said first type of conductivity having an emitter terminal which forms an input terminal of the stabilizer, and having a collector terminal which is connected to said emitter terminal of said first transistor and having a base terminal which is connected to a biasing and switching circuit means disposed between said base terminal of said second transistor and ground and said input terminal of the stabilizer.
Dependencies are inferred from the claim text.