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. 16, 1991
Filed:
Dec. 15, 1989
Applicant:
Inventors:
Gary B Cole, Knightdale, NC (US);
Michael J Gingell, Raleigh, NC (US);
Assignee:
Alcatel NA Network Systems Corp., Hickory, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; G11C / ;
U.S. Cl.
CPC ...
377 54 ; 377 77 ; 377 81 ; 377 70 ; 307602 ;
Abstract
A variable length shift register is formed of a plurality of flip-flops arranged to form separate shift registers of different lengths. The shift registers are interconnected by multiplexers which connect either the input or the output of each shift register to the input of an adjacent shift register. Control signals are provided to the multiplexers to controllably select the length of the variable shift register by selectively inserting shift registers into the variable shift register and bypassing others.