Systems and methods for translation of signal levels across voltage domains
US7205820B1 · kind B1 · utility
28Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2005 |
| Grant date | Apr 17, 2007 |
| Priority date | — |
| Expiry date | Aug 30, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/356165
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A level shifting circuit with a power monitor enable for mixed-voltage applications is described. The level shifter translates signals from a first power supply voltage domain to a second. The level shifter provides a known output state, rather than an undefined mid-rail state, when either of the power supplies for the voltage domains is not adequately powered. In addition, the level shifter is IDDQ (quiescent current) compliant when static, drawing negligible current from the power supply. The level shifter can be used with a power monitor circuit, which controls the level shifter during power-up with an enable signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.