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. 18, 1989
Filed:
Nov. 19, 1987
Applicant:
Inventor:
Yasuharu Yoshida, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
375102 ; 375 39 ; 455305 ;
Abstract
A 2.sup.n -level demodulated signal is resolved into 2.sup.(n+m) equal intervals by an (n+m)-bit A/D converter (12) and an (n+m)th significant bit is produced from the LSB output of the converter as a representation of an interfering signal contained in the demodulated signal, where m is equal to or greater than unity. A subtractor (5p, 5q; 32p, 32q) cancels the interfering signal with a cancelling signal supplied from a feedback control circuit (9, 11, 7; 16-19; 30-31) which derives it by controlling the amplitude of the (n+m)th significant bit in accordance with the amount of the interfering signal still present in the output of the subtractor.