Low current redundancy fuse assembly

Details Low current redundancy fuse assembly Low current redundancy fuse assembly

1995-05-26

1996-04-16

Westin, Edward P.

Electronic digital logic circuitry

Multifunctional or programmable

Having details of setting or programming of interconnections...

326 10, 327525, H03K 19003, H03K 19173

Patent

active

055086381

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 programing circuit; whereby, the bank of programming circuits can be enabled by alternately blowing one of two fuses in the bank-enabling circuit, and each programming logic can set by alternately blowing one of its pair of fuses thus cutting off any current path through the programing circuit regardless of the programing state of the circuit.

REFERENCES:
patent: 4689494 (1987-08-01), Chen et al.
patent: 4791319 (1988-12-01), Tagami et al.
patent: 4847810 (1989-07-01), Tagami
patent: 5059835 (1991-10-01), Lauffer et al.
patent: 5099149 (1992-03-01), Smith
patent: 5424672 (1995-06-01), Cowles et al.

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