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:
Dec. 21, 1982
Filed:
Nov. 03, 1980
Rex Rice, Menlo Park, CA (US);
Fairchild Camera and Instrument Corp., Mountain View, CA (US);
Abstract
A method and circuitry are disclosed for correcting bit errors introduced by random events in a data recirculating memory, such as a charge coupled memory device or a bubble memory. The bit errors, caused by random events such as by alpha particle bombardment or other causes, are corrected in circuitry that generates row and column parity bits corresponding to various segments of the information stored in the memory. Changes in the row and column parity bits uniquely define the location of failed bits circulating through the memory even though each failed bit has no fixed address, so that error detection circuitry thereafter may correct the error during the next or a subsequent bit recirculating cycle. The invention facilitates the use of very large memories, for example, on the order of one billion bits or more.