Electronic digital logic circuitry – Reliability – Redundant
Patent
1996-04-12
1997-09-02
Westin, Edward P.
Electronic digital logic circuitry
Reliability
Redundant
326 38, 327525, H03K 19003, H03K 19173
Patent
active
056636580
ABSTRACT:
In a microcircuit device such as a memory chip, where a bank of fuse-controlled latch pulse routing-circuits are used to program redundant circuits or other programming options with every memory cycle or multiple thereof, the amount of current drawn by every fuse-control circuit is reduced by controlling each bank of circuits with a bank-enabling, fuse-programmed circuit between the latch pulse source and the bank of fuse-controlled programing circuits, and by adding a second fuse into each programming circuit; whereby, the bank of programming circuits can be enabled by alternately blowing one of two fuses in the bank-enabling circuit, and each programing logic can be set by alternately blowing one of its pair of fuses, thus cutting off any current path through the programming circuit regardless of the programming state of the circuit.
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Cowles Timothy B.
Renfro Steven G.
Micro)n Technology, Inc.
Roseen Richard
Westin Edward P.
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