Fast turn on and off speed in PLL cascoded charge pump
US7514985B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 2007 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Mar 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0896
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A charge pump includes a first switch coupled between a first voltage source and a first node, second switch coupled between the first node and a second node, a third switch coupled between the second node and a third node, the third node is for outputting from the charge pump. A fourth switch is coupled between the output node and a fourth node, a fifth switch is coupled between the fourth node and a fifth node, and a sixth switch is coupled between the fifth node and ground. A seventh switch is coupled between ground and the first node and an eighth switch is coupled between a second voltage source and the fifth node. A first capacitor is coupled between the second node and a first voltage signal and a second capacitor is coupled between the fourth node and a second voltage signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.