Low power charge pump
US7834672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2007 |
| Grant date | Nov 16, 2010 |
| Priority date | — |
| Expiry date | Mar 11, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0802
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A charge pump is configured to control current flow at an output node in response to input signals. A plurality of control signals are generated based upon the input signals. The control signals operate to control the timing and duration of current flows within the charge pump and to thereby reduce charge pump power consumption. Based upon the control signals, the conductivity of a first path between a power supply and the output node and a second path between the output node and a ground potential is varied. Optionally, the charge pump is disposed as part of a phase-locked loop (PLL), the input signals are produced by a phase/frequency detector, and current flow at the output node controls an oscillator element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.