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. 13, 1983
Filed:
Feb. 09, 1981
Roy K Yamanouchi, San Jose, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An error correcting network adapted for encoding and decoding data transferred to and from a bubble memory has parallel linear encoder/decoder circuits. An error syndrome generated in response to a parity error in an initial read operation is used by one encoder/decoder circuit for correcting the parity error during a subsequent reread of the data. The error syndrome is also stored in a latch for comparison with a second error syndrome generated in response to the data during the reread operation. A true comparison between the two error syndromes verifies that that data has not changed between the two read operations due to a soft error and that the error correction of the first encoder/decoder circuit is valid.