Method and apparatus for linearizing an efficient class D/E power amplifier using delta modulation
US5847602A · kind A · utility
60Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Mar 3, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/0222
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A delta-modulated magnitude amplifier is used to amplify the magnitude component of an RF power amplifier that employs envelope elimination and restoration. The delta-modulated amplifier introduces a smaller amount of non-linearity than traditional approaches, which are based upon pulse-width modulation. The disclosed technique can be implemented using switched-capacitor circuits in a standard MOS technology with only two external components, i.e., an inductor and a capacitor. Thus, the disclosed technique allows the implementation of an efficient and yet linear RF power amplifier using low-cost MOS technology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.