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. 10, 2001
Filed:
Oct. 20, 1997
Toshiro Yoshida, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a feed-forward distortion compensating system, first and second laser diodes are provided on a same semiconductor chip to modulate first and second electric signals in light intensity to produce first and second light signals, respectively. A photoelectric conversion unit converts a part of the first light signal into a third electric signal. A distortion compensating signal generator synthesizes the third electric signal and a fourth electric signal associated with the first electric signal into the second electric signal. The second electric signal is light-intensity-modulated into the second light signal. A light signal synthesizing unit synthesizes the first light signal and the second light signal into a transmission light signal.