Level shifter with isolation on both input and output domains with enable from both domains
US10838483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Dec 15, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method for efficiently handling voltage level shifting are contemplated. In various embodiments, a first level shifter receives a first isolate enable signal based on a first power supply voltage and a second isolate enable signal based on a second power supply voltage different from the first power supply voltage. A second level shifter generates the first isolate enable signal based on both the second isolate enable signal and the first power supply voltage. A circuit block generates a data signal based on the first power supply voltage. When it is determined that isolation for the first level shifter is enabled, the first level shifter generates a voltage level on an internal particular node to a particular voltage level based on the first isolate enable signal, and also prevents, using the second isolate enable signal, the data signal from setting a voltage level on the particular node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.