Methods and apparatus for predictable level shifter power-up state
US8063662B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2008 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Jul 7, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/0375
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In one aspect, a level shifter for shifting a voltage level from a first voltage level to a second voltage level and having a predictable power-up state is provided. The level shifter comprises a first input and a second input forming a differential input to receive signals at the first voltage level, a first output and a second output forming a differential output to provide output signals at the second voltage level, and at least one circuit element coupled between the differential input and the differential output to pull the first output to a lower voltage level than the second output during power-up so that the level shifter powers-up in a desired state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.