Switched capacitor voltage converter for a power amplifier
US7760026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2009 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Feb 27, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/78
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage converter includes a plurality of capacitors and corresponding first switch elements, the capacitors coupled in series and arranged to each charge to a voltage level during a first clock period, the voltage level determined by a supply voltage level, the number of capacitors and a value of each capacitor; and a plurality of second switch elements configured to cause the plurality of capacitors to be connected in parallel and to discharge into an output capacitor during a second clock period, the output capacitor charged to a discrete voltage output level so that the output capacitor provides the discrete voltage output level, wherein the discrete voltage output level is less than the supply voltage level and wherein the discrete voltage output level is used to develop a bias signal that is supplied to a power amplifier element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.