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US 5,629,613 AGranted
CMOS voltage regulator
AssigneeSun Microsystems, Inc.
InventorsPhilip R. Marzolf, Alan C. Rogers
Life of this patent
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Abstract
In accordance with the teachings of this invention, a novel voltage regulator is taught which is capable of being formed solely of MOS devices. This eliminates the need to utilize off chip components to form a stand-alone voltage regulator, and avoid the process complexities and increased cost associated with BICMOS fabrication processes.
Claims16
A CMOS voltage regulator comprising:
- a first supply terminal for receiving a first supply voltage;
- a second supply terminal for receiving a second supply voltage;
- an output terminal for providing a regulated output voltage;
- a first MOS circuit providing a first current path coupled between said output terminal and said second supply terminal, which develops a first current as a function of said regulated output voltage, said first MOS circuit comprising a first and a second MOS transistor having their current carrying paths coupled in series between said second voltage supply terminal and said output terminal, and a common node coupled to said current mirror circuitry;
- a second MOS circuit providing a second current path coupled between said first supply terminal and said output terminal, which provides a second current from said first supply terminal to said output terminal as a function of said first current;
- and
- MOS current mirroring circuitry responsive to said first current to provide control of said second current.
4 more elements
Dependencies are inferred from the claim text.