Zero power dissipation laser fuse signature circuit for redundancy in vlsi design
US5051691A · kind A · utility
7Cited by
3References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Sep 13, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.