Negative voltage generation
US7733126B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2009 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Mar 31, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K3/356113
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A first logic state is at a first output voltage level at a first output of a level shifter that selects a first negative regulation voltage level in response to the first logic state. A negative supply voltage begins at first potential and decreases to the first negative regulation voltage level. The first output voltage level decreases as the negative supply voltage decreases. The first output of the level shifter is switched from the first logic state to a second logic state in response to the negative supply voltage reaching the first negative regulation voltage level. The second logic state is provided at a second output voltage level that selects a second negative regulation voltage level for the negative regulation voltage. The first output of the level shifter remains at the second logic state but is reduced in voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.