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. 12, 1982
Filed:
Dec. 17, 1976
Rex A Naden, Richardson, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A magnetic domain memory system is provided that includes magnetic domain data chips having a major-minor loop organization wherein the system may include data chips having one or more defective minor loops. An erasable non-volatile semiconductor memory device is provided to record locations of defective minor loops for each chip in the system. In order to update the defective minor loop locations when a data chip is replaced a random access memory is provided to store the present map of locations and substitute data designating the new defective minor loops. A method of replacing the map in the erasable non-volatile semiconductor memory is also disclosed. An array of binary one bit data in the form of '1' or '0' is stored in the non-volatile semiconductor memory to designate defective and operative minor loops.