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. 16, 2010
Filed:
Jan. 16, 2008
Jim Tark Chiu, Los Altos, CA (US);
Jim Tark Chiu, Los Altos, CA (US);
Vuemetrix, Inc., Sunnyvale, CA (US);
Abstract
A laser diode control system is configured to limit cascade failure of a series of laser diodes. The laser diode series is coupled to an output filter of a power supply. The power supply is a switch-mode power supply and the output filter includes an LC circuit. The laser diode control system includes a protection circuit coupled to the laser diode series. The protection circuit includes a post regulator circuit and an inductor coupled in series to the laser diode series. The post regulator includes a transistor and two amplifiers configured to regulate a voltage across the transistor. In the event of a failure within the laser diode series, a current spike across the laser diode series is prevented by regulating the voltage across resistor.