The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2001
Filed:
Aug. 11, 2000
Applicant:
Inventors:
Carl W. Moreland, Oak Ridge, NC (US);
Marvin J. Young, Greensboro, NC (US);
Assignee:
Analog Devices, Inc., Norwood, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/40 ; G05F 3/20 ;
U.S. Cl.
CPC ...
G05F 1/40 ; G05F 3/20 ;
Abstract
A bandgap reference circuit provides an output reference voltage that is generally insensitive to fluctuations in supply voltage, ambient temperature, and output load current. A current regulator establishes an output whose variations are reduced, preferably logarithmically, relative to variations in a supply voltage. A bandgap generator fed by the output current provides an output reference voltage with similarly suppressed variations. A control amplifier biases the bandgap generator to provide a high level common-mode rejection of various error sources.