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, 1994
Filed:
Apr. 24, 1992
Applicant:
Inventor:
Yuichi Maruyama, Kanagawa, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341143 ; 341 77 ;
Abstract
According to this invention, a noise shaper circuit capable of realizing an integrated circuit having a small chip area is provided. In calculating circuits for calculating input data represented by a twos complement and feedback data of output data converted into data having a small word length, the input data is divided into upper bits and lower bits with respect to a bit rounded off during a word length converting operation, only the upper bits are used in a calculation, and the calculation result and the lower bits which are not used in the calculation are added to the LSB of the calculation result again, and the resultant data is output to the next stage.