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:
Oct. 31, 1995
Filed:
Jun. 29, 1993
Vickie L Gibbs, Durham, NC (US);
Rom-Shen Kao, Durham, NC (US);
Mitsubishi Semiconductor America, Inc., Durham, NC (US);
Abstract
A circuit for determining locations of the errors that occur during data storage tests each possible error location using an error location polynomial. Accumulating registers of a set of multiplier accumulators are loaded with the components of the error location polynomial at the start of each 120-byte word to be tested. The output signals of the accumulating registers are transferred to an XOR checksum circuit. If the output of the XOR checksum circuit is determined to be zero, the current byte of the tested word is considered to be an error location. An external clock signal corresponding to the consecutive bytes to be tested saves the outputs of the unary multipliers for multiplying by the Galois field elements .alpha..sup.123 -.alpha..sup.131, through a feedback loop to the multiplier accumulating registers.