Electricity: electrical systems and devices – Safety and protection of systems and devices – Circuit interruption by thermal sensing
Reexamination Certificate
2005-12-15
2008-07-01
Sherry, Michael J (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Circuit interruption by thermal sensing
C327S525000
Reexamination Certificate
active
07394637
ABSTRACT:
A sense amplifier for detecting a logic state of a selected electrical fuse cell among a number of unselected electrical fuse cells includes a bias module coupled to a power supply for generating a first current, and a tracking module coupled to the bias module for generating a second current. A current supplier is coupled to the bias module and the tracking module for generating a third current substantially equal to a sum of the first and second currents scaled by a predetermined factor, the third current being diverted into a first sub-current flowing through the selected electrical fuse cell and a second sub-current leaking through the unselected electrical fuse cells. The tracking module is so configured that the second current scaled by the predetermined factor is substantially equal to the second sub-current, thereby avoiding the first sub-current to be reduced by the second sub-current.
REFERENCES:
patent: 5959445 (1999-09-01), Denham
patent: 6417720 (2002-07-01), Denham
patent: 6995601 (2006-02-01), Huang et al.
patent: 7119603 (2006-10-01), Newman
patent: 7215175 (2007-05-01), Mandal et al.
patent: 7221210 (2007-05-01), Parker et al.
Hsueh Fu-Lung
Huang Jiann-Tseng
Liao Hung-Jen
Lin Sung-Chieh
Kirkpatrick & Lockhart Preston Gates & Ellis LLP
Sherry Michael J
Taiwan Semiconductor Manufacturing Co. Ltd.
Willoughby Terrence R
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