Apparatus for improved delay voltage level shifting for large voltage differentials
US7301386B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Apr 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/01707
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage level shifting device for translating a lower operating voltage to a higher operating voltage includes a first input node coupled to a first pull down device and a second input node coupled to a second pull down device. The second node receives a complementary logic signal with respect to the first input node, the first and second input nodes associated with the lower operating voltage. A first pull up device is in series with the first pull down device and second pull up device is in series with the second pull down device, with the first and second pull up devices coupled to a power supply at the higher operating voltage. An output node is between the second pull down device and the second pull up device, the output node controlling the conductivity of the first pull up device. A clamping device is in parallel with the first pull up device, and configured to prevent the second pull up device from becoming fully saturated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.