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. 16, 1986
Filed:
Dec. 20, 1983
Noboru Kobayashi, Yokohama, JP;
Satoshi Konishi, Tokyo, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
A method of programming for a programmable circuit in a redundancy circuit system including a RAM having normal and spare memory cell rows constructed on a common chip and the programmable circuit, is disclosed. The programmable circuit has a plurality of fuses and can produce a signal for disabling all the normal memory cell rows while enabling a spare memory cell row corresponding to a combination of blown-out fuses and non-blown-out ones among the plurality of fuses with respect to a certain normal memory cell row address. The method comprises the steps of detecting a faulty memory cell row, storing the address thereof and supplying a fuse-blowing current one after another of those of the programmable circuit fuses which correspond to a certain logic level bits of the stored address.