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:
Aug. 31, 2010
Filed:
Oct. 09, 2008
Michael J. Gay, Coppet Vaud, CH;
Michael J. Gay, Coppet Vaud, CH;
Marvell International Ltd., Hamilton, BM;
Abstract
Circuits, architectures, systems, and methods for generating temperature-stable reference voltages with offset compensation. The circuits generally include a diode junction voltage generator, and three composite voltage generators configured to operate in first and second phases or modes of operation. The diode junction voltage generator produces first and diode junction voltages with different current densities (Vdand Vd). The first composite voltage (VC) comprises at least a fraction of the first and/or second diode junction voltage. The second composite voltage (VC) is generated during the first phase and comprises a difference between Vdand a sum of VCand an offset voltage (Ve) of an amplifier and/or other summation circuit. The third composite voltage (VC) is generated during the second phase such that VCis proportional to a difference between Vdand a sum of Ve and VC. A temperature-stable reference voltage proportional to VCmay be continuously generated. Embodiments advantageously produce reference voltages much smaller than the band-gap voltage, are substantially insensitive to any voltage offset in the associated summation circuit, and/or produce low noise without further filtering.