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:
Apr. 03, 2001
Filed:
Mar. 13, 1997
Applicant:
Inventor:
Toshiro Yoshida, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/000 ;
U.S. Cl.
CPC ...
H04B 1/000 ;
Abstract
A clipping distortion controlling circuit for stabilizing an amount of generation of the clipping distortion. A level of the clipping distortion generated by a light-emitting semiconductor laser element is monitored through a light-receiving element and a band-pass filter. A limiter-level of a pre-clipping circuit is changed to be controlled in accordance with the level of the clipping distortion. For this reason, it is capable of coping with the level-fluctuation of the clipping distortion caused by gain-change of an amplifier or by characteristic degradation of the light-emitting element, so that clipping distortion generation has a stabilized characteristic.