US 2016/0087727 A1 · Optical Modulator Driver Circuit and Optical Transmitter

Optical Modulator Driver Circuit and Optical Transmitter

AssigneeNippon Telegraph and Telephone Corporation

InventorsMunehiko Nagatani, Hideyuki Nosaka, Toshihiro Itoh, Koichi Murata, Hiroyuki Fukuyama, Takashi Saida, Shin Kamei, Hiroshi Yamazaki, Nobuhiro Kikuchi, Hiroshi Koizumi, Masafumi Nogawa, Hiroaki Katsurai, Hiroyuki Uzawa, Tomoyoshi Kataoka, Naoki Fujiwara, Hiroto Kawakami, Kengo Horikoshi, Yves Bouvier, Mikio Yoneyama, Shigeki Aisawa, Masahiro Suzuki

Life of this patent

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Abstract

An optical modulator driver circuit (1) includes an amplifier (50, Q10, Q11, R10-R13), and a current amount adjustment circuit (51) capable of adjusting a current amount of the amplifier (50) in accordance with a desired operation mode. The current amount adjustment circuit (51) includes at least two current sources (IS10) that are individually ON/OFF-controllable in accordance with a binary control signal representing the desired operation mode.

Claims13

Dependent claims

An optical modulator driver circuit

comprising:
an amplifier that amplifies an input signal and outputs a signal to drive an optical modulator;
and
a current amount adjustment circuit capable of adjusting a current amount of the amplifier in accordance with a desired operation mode.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

14/889,127Filed 9 May 2014

Priority

JP 2013-0990259 May 2013

Published

24 Mar 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification43 codes

H04B 10/541
Intensity modulation: digital intensity or amplitude modulation
H03F 1/223
By use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively: with mosfet's
H03F 1/32
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements: modifications of…
H03F 3/04
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements: with semiconductor devices only