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:
Jan. 12, 2016
Filed:
Dec. 18, 2013
Universal Lighting Technologies, Inc., Madison, AL (US);
Wei Xiong, Madison, AL (US);
John J. Dernovsek, Madison, AL (US);
Candice Ungacta, Huntsville, AL (US);
Universal Lighting Technologies, Inc., Madison, AL (US);
Abstract
A constant current driver circuit is operable to provide power to a light source. The driver circuit utilizes a microcontroller based oscillator to drive a current source tank circuit. The microcontroller based oscillator is controlled by a differential error feedback signal. The differential error feedback signal is produced by a proportional integral control loop. The proportional integral control loop is used to eliminate steady state error of the driver circuit. Dynamic frequency or duty cycle control of the current source tank circuit by the microcontroller is based on the integrated error signal between a reference current signal and a sensed output current of the current source tank circuit.