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:
Jul. 21, 2015
Filed:
Jul. 12, 2012
Applicant:
Akihiro Moto, Yokohama, JP;
Inventor:
Akihiro Moto, Yokohama, JP;
Assignee:
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01S 3/00 (2006.01); H01S 5/026 (2006.01); H01S 5/042 (2006.01); H01S 5/00 (2006.01); H01S 5/062 (2006.01); H01S 5/12 (2006.01);
U.S. Cl.
CPC ...
H01S 5/0265 (2013.01); H01S 5/0085 (2013.01); H01S 5/042 (2013.01); H01S 5/0428 (2013.01); H01S 5/0264 (2013.01); H01S 5/06226 (2013.01); H01S 5/12 (2013.01);
Abstract
A driver for an EA-DFB device includes a switching device. The EA-DFB device is put between a positive power supply and a negative power supply as connected in series to a bias current source and the switching device. The EA device is modulated by the switching device in the differential mode. The switching device includes paired transistors each having a load, one of which is a resistor connected in parallel to the EA device, while, the other is constituted by a resistive element.