Fuse sensing circuit

Details Fuse sensing circuit Fuse sensing circuit

2007-12-04

2007-12-04

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Fusible link or intentional destruct circuit

C365S225700

Reexamination Certificate

active

11292039

ABSTRACT:
A sensing circuit senses the programmed state of fuses such as polysilicon (poly) fuses. In a preferred embodiment, the sensing circuit comprises first and second amplifier stages, a fuse and a reference resistor wherein the fuse and the reference resistor are connected, respectively, to first and second inputs of the first amplifier stage. The first and second amplifier stages are differential amplifiers and the output of the second amplifier stage is buffered. Circuitry for programming the fuse is part of the sensing circuit.

REFERENCES:
patent: 6384664 (2002-05-01), Hellums et al.
patent: 6567333 (2003-05-01), Toda
patent: 6819144 (2004-11-01), Li et al.
patent: 6919754 (2005-07-01), Kuroki
patent: 7019534 (2006-03-01), Wu
patent: 2005/0195016 (2005-09-01), Wu

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