Systems and methods for controlling a fuse programming...

Details Systems and methods for controlling a fuse programming... Systems and methods for controlling a fuse programming...

2008-07-29

2008-07-29

Tran, Anh Q (Department: 2819)

Electronic digital logic circuitry

Multifunctional or programmable

Having details of setting or programming of interconnections...

C326S037000, C326S030000

Reexamination Certificate

active

11779411

ABSTRACT:
Systems and methods for controlling the programming current directed through a fuse or set of fuses in a device such as an integrated circuit. One embodiment comprises a method for applying different currents to a set of calibration fuses, identifying which currents cut the corresponding fuses without destroying them, and selecting one of the identified currents to use in programming one or more target fuses. In one embodiment, fuses that are cut but not destroyed are identified by passing the same read current through each of the calibration fuses and comparing resulting voltages to reference voltages which correspond to impedances between the impedances of the possible fuse states (uncut, cut and destroyed.) Fuse voltages between the reference voltages identify fuses which are cut but not destroyed.

REFERENCES:
patent: 6972614 (2005-12-01), Anderson, II et al.
patent: 7254078 (2007-08-01), Park et al.
patent: 2007/0081406 (2007-04-01), Boerstler et al.

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