Low current redundancy fuse assembly

Details Low current redundancy fuse assembly Low current redundancy fuse assembly

1994-02-24

1995-06-13

Hudspeth, David R.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Fusible link or intentional destruct circuit

326 38, 326 10, 327526, G06F 738, H03K 19173

Patent

active

054246725

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 programming circuits, and by adding a second fuse into each programming circuit; whereby, the bank of programing 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 programming circuit regardless of the programming 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

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