Fuse sensing circuit
US7304527B1 · kind B1 · utility
8Cited by
5References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Jan 11, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sensing circuit senses the programmed state of fuses such as polysilicon (poly) fuses. In a preferred embodiment, the sensing circuit comprises first and second amplifier stages, a fuse and a reference resistor wherein the fuse and the reference resistor are connected, respectively, to first and second inputs of the first amplifier stage. The first and second amplifier stages are differential amplifiers and the output of the second amplifier stage is buffered. Circuitry for programming the fuse is part of the sensing circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.