Circuits associated with fusible elements for establishing...

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Fusible link or intentional destruct circuit

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07084696

ABSTRACT:
A state detection circuit for a fusible element includes a differential sensing circuit that compares voltage at a detection point in a path containing the fusible element with that at a reference point in a path establishing a non-zero reference voltage. The paths are similarly configured except one contains the fusible element while the other contains a device establishing the reference voltage. The two paths in any given sensing circuit are located in close proximity to each other so that even though element parameters in the paths of different sensing circuits may vary significantly, those values track each other in the given sensing circuit. As a result, the normal non-zero value of the voltage at the reference point maintains a relationship to that at the detection point that enables the differential sensing circuit to detect between a fused and an unfused element irrespective of variation in circuit element parameters. In order to prevent detection circuits and other circuits on the chip being damaged, during blowing of the fusible elements, voltage level of the sensing circuits are chosen to isolate the detection circuits from the other circuits on the semiconductor chip and the excitation levels applied to the detection circuits are raised to maintain differential voltages in the detection circuits at sufficiently low levels to prevent damage.

REFERENCES:
patent: 6384664 (2002-05-01), Hellums et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Circuits associated with fusible elements for establishing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuits associated with fusible elements for establishing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuits associated with fusible elements for establishing... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3713830

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.