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. 01, 2009
Filed:
Jun. 29, 2005
Stefan W. Wiktor, Raleigh, NC (US);
Vladimir A. Muratov, Manchester, NH (US);
Xuening LI, Cary, NC (US);
Stefan W. Wiktor, Raleigh, NC (US);
Vladimir A. Muratov, Manchester, NH (US);
Xuening Li, Cary, NC (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
An apparatus for driving a pulse width modulation reference signal includes: (a) A converting unit receiving an input signal at an input locus and presenting an output current at an output locus. The input signal varies at a first frequency. The output current is substantially related with the first frequency. (b) A capacitive element coupled with the output locus for charging by the output current. The pulse width modulation reference signal is related with voltage across the capacitive element.