Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Fusible link or intentional destruct circuit
Reexamination Certificate
2007-06-26
2007-06-26
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Fusible link or intentional destruct circuit
C326S037000
Reexamination Certificate
active
11212776
ABSTRACT:
To prevent blowing of a fuse resistor due to application of static electricity to a trimming pad. In a fuse trimming circuit capable of switching the input level of a CMOS input circuit by supplying a voltage or a current to a trimming pad so as to blow a fuse resistor, a P-channel MOS transistor is inserted and connected between the trimming pad and the fuse resistor, and the MOS transistor is controlled to be turned on at a time of trimming. Thus, at the time of the trimming, electrical connection can be established between the trimming pad and the fuse resistor. At all times except the time of the trimming, electrical disconnection can be performed between the trimming pad and the fuse resistor if a control signal is not supplied to the control pad. Further, the parasitic diode of the MOS transistor functions as a static protection diode.
REFERENCES:
patent: 5731733 (1998-03-01), Denham
patent: 6617875 (2003-09-01), El-Ayat
patent: 2000-133778 (2000-05-01), None
Callahan Timothy P.
Englund Terry L.
LandOfFree
Fuse trimming circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuse trimming circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuse trimming circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3865326