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:
Mar. 19, 2013
Filed:
Jan. 05, 2010
Applicants:
Vipin C. Madhani, Burlington, MA (US);
Alan Adamsky, Newton, MA (US);
Inventors:
Vipin C. Madhani, Burlington, MA (US);
Alan Adamsky, Newton, MA (US);
Assignee:
OSRAM SYLVANIA Inc., Danvers, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01J 1/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A current source circuit to drive a light source in an optical sensor system is disclosed. The current source includes an inductor connected in series with a resistor, and a diode coupled in parallel with the inductor and resistor. The current source is configured to receive a regulated direct current (DC) voltage and to provide the current through the inductor to the light source when a switch is closed, and to divert current through the inductor to the diode when the switch is open.