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:
Feb. 10, 2015
Filed:
Oct. 25, 2011
Applicants:
Sean S. Chen, Sunnyvale, CA (US);
Jeff Kotowski, Nevada City, CA (US);
Timothy James Herklots, Cupertino, CA (US);
Inventors:
Sean S. Chen, Sunnyvale, CA (US);
Jeff Kotowski, Nevada City, CA (US);
Timothy James Herklots, Cupertino, CA (US);
Assignee:
Atmel Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 41/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
The disclosed multi-channel driver equalizer circuit matches currents in multiple strings of illumination devices at low current levels by using an analog equalizer to sequentially couple the output of a reference amplifier in series with each current source amplifier in a current limit loop of the driver equalizer circuit to correct the offsets of the current source amplifiers, resulting in the matching of string currents on average.