Zero power dissipation laser fuse signature circuit for redundan

Details Zero power dissipation laser fuse signature circuit for redundan Zero power dissipation laser fuse signature circuit for redundan

1990-09-13

1991-09-24

Wieder, Kenneth

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

With rotor

324 731, 324550, 371 211, G01R 3102, G06F 1100

Patent

active

050516914

ABSTRACT:
A laser fuse signature circuit for testing whether a fuse link in an IC has been disconnected includes a first series circuit connecting the power and ground pins and a second series circuit, including the fuse and a plurality of diode devices, connecting an input pin to a first node in the first series circuit. Transistors included in the first series circuit are connected so that the laser fuse signature circuit does not conduct current during normal operation or leakage current testing of the IC.

REFERENCES:
patent: 4698589 (1987-10-01), Blankenship et al.
patent: 4701695 (1987-10-01), Chan et al.
patent: 4837520 (1989-06-01), Golke et al.

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