Maximum supply voltage selection
US10090674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2015 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Sep 21, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/249
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method includes providing supply voltages to a supply voltage switching circuit that controls routing of the supply voltages to power consuming circuitry associated with the supply voltage switching circuit. The method includes comparing the supply voltages, including using at least one relatively lower precision comparator to compare the supply voltages for a relatively large difference between the supply voltages; and using at least one relatively higher precision comparator to compare the supply voltages for a relatively smaller difference between the supply voltages. The method further includes, based on a result of comparing the supply voltages, selectively coupling the supply voltages to at least one of an isolation well and a power supply rail of the supply voltage switching circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.