Voltage glitch detection circuit
US11947672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2021 |
| Grant date | Apr 2, 2024 |
| Priority date | — |
| Expiry date | Feb 3, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/034
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A voltage glitch detector includes a ring oscillator, a plurality of counters, a combined result circuit, and a result evaluation circuit. The ring oscillator includes a plurality of series-connected stages. An output of a last stage of the ring oscillator is coupled to an input of a first stage of the ring oscillator. Each counter of the plurality of counters has an input coupled to a node located between two stages of the plurality of series-connected stages. The combined result circuit is coupled to each of the plurality of counters. The combined result circuit combines the count values received from each counter of the plurality of counters to provide a combined result. The result evaluation circuit is coupled to compare the combined result with a reference value to determine when a voltage glitch is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.