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:
Jun. 10, 2003
Filed:
Dec. 22, 1999
Benoit R. Veillette, Mt. Kisco, NY (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A system and method for the dynamic power control of a ballast, wherein a compander is used to reduce dynamic input range requirements of an analog-to-digital converter (ADC) in power systems having dynamic signal ranges that are several orders of magnitude smaller than the largest signal being sampled. The present invention compresses an analog power signal and then digitizes and expands the signal to attain a digitized signal having an amplitude identical to the analog signal, thereby providing a power control system that is less expensive and less complicated than conventional power systems. The present invention can use algorithms to calculate both the expansion values and correction values required for a power control circuit to adjust an output power level toward a desired value.