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:
Sep. 05, 2017
Filed:
Aug. 28, 2015
Applicant:
Stmicroelectronics (Research & Development) Limited, Marlow Bucks, GB;
Inventor:
Shatabda Saha, Edinburgh, GB;
Assignee:
STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED, Marlow Bucks, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S 5/00 (2006.01); G01C 3/02 (2006.01); G01R 17/02 (2006.01); H01S 5/068 (2006.01); H01S 5/042 (2006.01); H01S 5/183 (2006.01);
U.S. Cl.
CPC ...
G01R 17/02 (2013.01); G01C 3/02 (2013.01); H01S 5/06825 (2013.01); H01S 5/0428 (2013.01); H01S 5/183 (2013.01);
Abstract
A device such as a laser diode is provided with a monitoring arrangement. The monitoring arrangement has voltage to current converters arranged to provide respectively currents which are proportional to the respective voltages on an anode and on a cathode of the laser diode. The monitoring arrangement provides a first output signal when the laser diode is on too long. That output signal is used to cause the laser diode to be switched off.