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. 01, 2013
Filed:
Dec. 13, 2011
Applicants:
Tsuyoshi Horiuchi, Tokyo, JP;
Takehiko Umeyama, Tokyo, JP;
Inventors:
Tsuyoshi Horiuchi, Tokyo, JP;
Takehiko Umeyama, Tokyo, JP;
Assignee:
Renesas Electronics Corporation, Kawasaki-Shi, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A driving circuit supplies a suppression current (I) which reduces a decrease in a driving current (Idrive) immediately after occurrence of an overshoot at the time of the rise of the driving current (Idrive) to a laser diode (). The driving circuit draws a suppression current (I) which reduces an increase in the driving current (Idrive) immediately after occurrence of an undershoot at the time of the fall of the driving current (Idrive) from the driving current (Idrive).