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:
Feb. 09, 1993
Filed:
Feb. 13, 1992
John McNesby, Mesa, AZ (US);
Amritpal S Kalla, Cupertino, CA (US);
Angel Rodriguez, Jackson, NJ (US);
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
A data scrambler circuit which adds the SONET polynomial 1+X.sup.6 +X.sup.7 to data in a parallel format to thereby reduce circuitry clock rates to one-eighth the line rate, which reduces power consumption and simplifies timing constraints. A circuit embodiment includes a first series of flip-flops connected to generate the polynomial and a second series of flip-flops for holding the generated polynomial. To provide a relatively large window of time for looking at the data, parallel data is obtained by providing a parallel-to-parallel register at the output of a serial-to-parallel register. The parallel data is added to the held polynomial by a series of exclusive OR gates.