Title:
増幅回路及び光通信装置
Document Type and Number:
Japanese Patent JP4005401
Kind Code:
B2
Abstract:
An amplification circuit used in an optical communication apparatus includes a first amplifier for generating a first voltage signal corresponding to an input current, a second amplifier for amplifying the first voltage signal and generating a second voltage signal, a gain control circuit for generating a gain control signal for adjusting the gain of the first amplifier based on the second voltage signal, and a bias control circuit for generating a bias control signal for adjusting the bias current at the output of the first amplifier based on the gain control signal. The bias control signal stabilizes the bias voltage of the first amplifier during gain adjustment of the first amplifier.
Inventors:
Nishizono Kazunori
Application Number:
JP2002118233A
Publication Date:
November 07, 2007
Filing Date:
April 19, 2002
Export Citation:
Assignee:
富士通株式会社
International Classes:
H03G3/30; H03F3/08; H04B10/40; H04B10/50; H04B10/60; H04B10/69
Domestic Patent References:
| JP4296127A | ||||
| JP63181536A | ||||
| JP10107555A | ||||
| JP5244039A | ||||
| JP2001196877A | ||||
| JP2000252774A | ||||
| JP52086040A | ||||
| JP60173938A | ||||
| JP58075309A | ||||
| JP7193437A | ||||
| JP63201583A |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda