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. 07, 2010
Filed:
Dec. 19, 2007
Masaji Noguchi, Kawasaki, JP;
Tomohiro Ueno, Kawasaki, JP;
Yutaka Kai, Kawasaki, JP;
Setsuo Yoshida, Kawasaki, JP;
Masaji Noguchi, Kawasaki, JP;
Tomohiro Ueno, Kawasaki, JP;
Yutaka Kai, Kawasaki, JP;
Setsuo Yoshida, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A drive circuit is provided for a semiconductor optical amplifier type gate switch includes a first transmission path and a second transmission path. The first transmission path includes a common first sub-path between a signal source and a first node; and an individual second sub-path for each of a plurality of operational amplifiers between the first node and a corresponding one of the operational amplifiers. The second transmission path includes an individual third sub-path between each of the operational amplifiers and a second node; and a common fourth sub-path between the second node and the semiconductor optical amplifier type gate switches. Transmission delay times of all the individual second sub-paths are equal, and transmission delay times of all the individual third sub-paths are equal.