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:
Dec. 27, 2005
Filed:
Mar. 03, 2004
Applicants:
David Dening, Stokesdale, NC (US);
David E. Reed, Westminster, CO (US);
Baker Scott, Boulder, CO (US);
Inventors:
David Dening, Stokesdale, NC (US);
David E. Reed, Westminster, CO (US);
Baker Scott, Boulder, CO (US);
Assignee:
RF Micro Devices, Inc., Greensboro, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K003/84 ;
U.S. Cl.
CPC ...
Abstract
A DC—DC converter includes a variable frequency oscillator, a control system and a power train. The DC—DC converter is well suited for use in a cell phone. The control system uses the output of the oscillator to control the power train. The oscillator varies its frequency as a function of a pseudo random number generator, thereby reducing electromagnetic interference caused by ripple in the output of the DC—DC converter.