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:
Apr. 02, 2002
Filed:
Feb. 21, 2001
Jin Keun Oh, Ichon, KR;
Jae Kyung Wee, Seoul, KR;
Chang Hyuk Lee, Ichon, KR;
Phil Jung Kim, Ichon, KR;
Hyundai Electronics Industries Co., Ltd., Hyungki-do, KR;
Abstract
An antifuse repair circuit is disclosed for selectively programming a specific antifuse to replace a defective cell with a redundant cell. The antifuse repair circuit includes: (a) a special test mode decoder for selecting an antifuse box according to an address signal; (b) a bank selector for selecting an antifuse bank according to the output signal from the special test mode decoder and the address signal; (c) a special address multiplexer for selecting a specific antifuse within an antifuse bank selected by the bank selector according to the output signal from the bank selector and the address signal; (d) a negative voltage generator for generating a negative voltage to program an antifuse device; (e) a power-up detector for detecting the supply voltage to generate a plurality of control signals in order to detect whether the antifuse device is programmed; (f) a unit antifuse circuit for programming the antifuse device according to the signals from the special test mode detector, the special address multiplexer, the negative voltage generator and the power-up detector; and (g) a repair circuit responsive to the output signal from the unit antifuse circuit and an external control signal to replace a defective cell with a redundant cell.