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:
Jul. 02, 1996
Filed:
Dec. 28, 1994
Applicant:
Inventor:
Shiro Fujihara, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ; G06F / ; G11C / ;
U.S. Cl.
CPC ...
36471508 ; 377 64 ; 341 67 ; 341 95 ;
Abstract
The barrel shifter of the present invention comprises a latch circuit of (m+n) bit, a register for indicating an effective bit length retained in the latch circuit, a selector for connecting the variable length code of maximum n bit with the latch circuit and a counting circuit for counting shifting number. In this invention, the latch circuit is divided by k bit, and the selector is controlled so as to shift bits of difference between the value lastly shifted and the value of the register, and data is retained at the latch circuit. When the value of register exceeds m, the selector outputs m bits to the latch circuit and the data at the latch circuit is shifted m bits.