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:
Sep. 21, 2004
Filed:
May. 05, 2000
Justin A Drummond-Murray, Chorleywood, GB;
Ruben Aszkenasy, Chesham, GB;
3Com Corporation, Santa Clara, CA (US);
Abstract
Apparatus for performing a cyclic redundancy code check on a binary digital signal consisting of a variable multiplicity (M) of data bytes comprises a buffer register for temporarily storing in succession segments each consisting of an integral number (N) of bytes. Each successive segment is loaded into a cyclic redundancy checker which produces a remainder after performing polynomial division of the digital signal. When the number of bytes of the digital signal in the last segment is less than the integral plurality (N) that last segment is padded with constant data. The signal is deemed valid if the remainder matches any of a plurality of predetermined remainders each corresponding to the operation of the checker on a valid digital signal padded with zero to (N−1) bytes of the constant data