Fuse trimming circuit

Details Fuse trimming circuit Fuse trimming circuit

2008-04-22

2008-04-22

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Fusible link or intentional destruct circuit

Reexamination Certificate

active

11521463

ABSTRACT:
The present invention provides a fuse trimming circuit that can reduce power consumption and improve operation reliability. The fuse trimming circuit is provided with a fuse-state determining circuit, which determines whether a fuse element is in an unblown state or in a blown state by comparing drain currents flowing to transistors, and a latch circuit which latch trimming information representing the state of the fuse element. After the determining operation, a bias circuit generating a bias voltage applied to the transistors. Drain currents do not flow to the transistors, so that a state of the fuse element is precisely determined even if the fuse device is in an incomplete blown state.

REFERENCES:
patent: 4532607 (1985-07-01), Uchida
patent: 5731733 (1998-03-01), Denham
patent: 6205077 (2001-03-01), Ferrant
patent: 6288598 (2001-09-01), Huang et al.
Japan Institute of Invention and Innovation Journal of Technical Disclosure No. 2001-6215, Dec. 3, 2001; English translation.

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