Shared pull-up and selection circuitry for programmable cells su

Details Shared pull-up and selection circuitry for programmable cells su Shared pull-up and selection circuitry for programmable cells su

1997-08-20

1999-02-23

Nelms, David

Static information storage and retrieval

Read/write circuit

Having fuse element

365100, G11C 800

Patent

active

058751440

ABSTRACT:
A single pull-up circuit is shared between a redundant row antifuse cell, and a redundant column antifuse cell. Additionally, a single selection circuit is shared between the two antifuse cells. A row selection signal supplied thereto selects the antifuse cell for the redundant row, while a column selection signal selects the antifuse cell for the redundant column. A small channel length transistor is employed within the latch circuit. As a result, the latch can quickly pull up a value when the antifuse cell is not blown, and quickly latch that value within the latch since an RC time constant of the latch is decreased. A pulsed pull-up signal having a very short duration is employed to enable the latch. Since the pulsed pull-up signal has a short duration, a high voltage supply V.sub.CC is provided through the latch and a blown antifuse cell to ground for only a short duration, thereby minimizing the possibility of such a low resistance current path from damaging the circuitry. A transistor having a large channel resistance, however, is placed within a feedback path of the latch. Therefore, after the latch is set, if the antifuse cell is blown, the high resistance transistor provides a resistive current path from the V.sub.CC to ground.

REFERENCES:
patent: 4689494 (1987-08-01), Chen et al.
patent: 4714839 (1987-12-01), Chung
patent: 4720817 (1988-01-01), Childers
patent: 5412593 (1995-05-01), Magel et al.
patent: 5442589 (1995-08-01), Kowalski
patent: 5448187 (1995-09-01), Kowalski
patent: 5495436 (1996-02-01), Callahan
patent: 5526312 (1996-06-01), Eltoukhy
patent: 5572458 (1996-11-01), Smith et al.
patent: 5572476 (1996-11-01), Eltoukhy
patent: 5734617 (1998-03-01), Zheng

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