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:
Oct. 31, 2006
Filed:
Apr. 16, 2002
Koji Nagatomo, Fukuoka, JP;
Satoshi Yamamoto, Fukuoka, JP;
Koji Nagatomo, Fukuoka, JP;
Satoshi Yamamoto, Fukuoka, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An optical receiver controls the amplitude of a light signal at a constant level so as to be constant for improvements in the quality of signal regeneration and reliability. A modulation part modulates the amplitude of the light signal. An opto-electric conversion part converts the output signal of the modulation part into an electric signal. A gain varying part amplifies the electric signal. A control part controls the gain of the gain varying part so that a variation width of the envelope line after signal amplification becomes close to a given value. A regeneration part compares the signal after amplification with a given threshold value for signal decision.