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. 26, 2019
Filed:
May. 09, 2014
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Munehiko Nagatani, Tokyo, JP;
Hideyuki Nosaka, Tokyo, JP;
Toshihiro Itoh, Tokyo, JP;
Koichi Murata, Tokyo, JP;
Hiroyuki Fukuyama, Tokyo, JP;
Takashi Saida, Tokyo, JP;
Shin Kamei, Tokyo, JP;
Hiroshi Yamazaki, Tokyo, JP;
Nobuhiro Kikuchi, Tokyo, JP;
Hiroshi Koizumi, Tokyo, JP;
Masafumi Nogawa, Tokyo, JP;
Hiroaki Katsurai, Tokyo, JP;
Hiroyuki Uzawa, Tokyo, JP;
Tomoyoshi Kataoka, Tokyo, JP;
Naoki Fujiwara, Tokyo, JP;
Hiroto Kawakami, Tokyo, JP;
Kengo Horikoshi, Tokyo, JP;
Yves Bouvier, Tokyo, JP;
Mikio Yoneyama, Tokyo, JP;
Shigeki Aisawa, Tokyo, JP;
Masahiro Suzuki, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
An optical modulator driver circuit () includes an amplifier (, Q, Q, R-R), and a current amount adjustment circuit () capable of adjusting a current amount of the amplifier () in accordance with a desired operation mode. The current amount adjustment circuit () includes at least two current sources (IS) that are individually ON/OFF-controllable in accordance with a binary control signal representing the desired operation mode.