Mixed-signal process-specific function
US11080431B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2017 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Mar 13, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/76
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for authenticating analog mixed-signal integrated circuits using process-specific functions (PSF) comprising: presenting wafer having plurality of dies, each die having circuit with identical design but having inherent physical differences due to process variation in their manufacture, each circuit designed to enhance the effects of the inherent differences; defining selected number of inputs/stimuli for authenticating and identifying each integrated circuit; defining expected response for each circuit, wherein the expected response for each circuit is the same due to the identical design; defining statistical window for analog response by the circuit to the inputs/stimuli; applying the inputs/stimuli to each circuit; receiving analog response corresponding to the applied inputs/stimuli, wherein the analog response falls outside statistical window when there are functional or physical changes to the circuit; separating from plurality of dies each die providing a response outside the statistical window, wherein only identified/authenticated dies remain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.