Anti-fuse circuit and anti-fusing method

Details Anti-fuse circuit and anti-fusing method Anti-fuse circuit and anti-fusing method

2008-01-08

2008-01-08

Tran, Andrew Q. (Department: 2824)

Static information storage and retrieval

Read/write circuit

Having fuse element

C365S230080, C365S189110, C365S189070, C365S189090, C365S200000

Reexamination Certificate

active

07317651

ABSTRACT:
An anti-fuse and an anti-fusing method are disclosed. An example embodiment of the present invention is directed to an anti-fuse circuit, including an anti-fuse receiving a first voltage, a pull-up transistor coupled between the anti-fuse and a first node, the pull-up transistor configured to pull up a voltage at the first node to the first voltage when the anti-fuse is in a given operation mode, a pull-down transistor configured to pull down the voltage at the first node to a second voltage in response to a pull-down control signal, the second voltage lower than the first voltage, a voltage level detector configured to compare a detection reference voltage level with a voltage level at the first node to generate a detection output signal and a pull-down control circuit configured to generate the pull-down control signal based on a fuse input signal and the detection output signal.

REFERENCES:
patent: 5604694 (1997-02-01), Callahan
patent: 5631862 (1997-05-01), Cutter et al.
patent: 6191984 (2001-02-01), Noh
patent: 6363021 (2002-03-01), Noh
patent: 2006/0062060 (2006-03-01), Min et al.
patent: 2006/0092729 (2006-05-01), Min et al.
patent: 2006/0214261 (2006-09-01), You et al.
patent: 2006/0268646 (2006-11-01), Kim et al.
patent: 2002-134620 (2002-05-01), None
patent: 2006-216954 (2006-08-01), None

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