Redundancy circuit for programmable integrated circuits

Details Redundancy circuit for programmable integrated circuits Redundancy circuit for programmable integrated circuits

1997-03-26

1998-10-06

Yoo, Do Hyun

Static information storage and retrieval

Read/write circuit

Having fuse element

365 96, 36518909, G11C 1716

Patent

active

058187782

ABSTRACT:
An antifuse redundancy circuit operates with transparency to external circuitry and users. In one embodiment, an antifuse redundancy circuit incorporates two antifuses rather than one. The circuit is arranged so that both antifuses may be simultaneously programmed and read. If a single antifuse is programmed without programming the other antifuse, the antifuse redundancy circuit will register a programmed antifuse. Additionally, if a single programmed antifuse is unintentionally deprogrammed after both antifuses in the redundancy circuit have been programmed, the antifuse redundancy circuit will continue to register a programmed antifuse. The result is both an increase in manufacturing yield and an increase in the reliability of integrated circuits utilizing antifuses.

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