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:
Jan. 25, 2000
Filed:
May. 20, 1997
Applicant:
Inventors:
Ichiro Hatakeyama, Tokyo, JP;
Takeshi Nagahori, Tokyo, JP;
Assignee:
NEC Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
359189 ; 327309 ; 375317 ;
Abstract
An optical receiving circuit comprising a plurality of amplifying circuits successively connected in a multiple stage form, each of the plurality of amplifying circuits having an offset compensating function. The optical receiving circuit includes offset compensating circuits respectively arranged in the plurality of amplifying circuits. Time constants of the offset compensating circuits are set in such a manner that the time constant of an offset compensating circuit arranged at one stage is smaller than that of an offset compensating circuit arranged at the previous stage.