Method and apparatus for high efficiency power amplification
US5942938A · kind A · utility
28Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1997 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Dec 29, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/516
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for efficient power amplification of a modulated signal includes an envelope detector (220), an multi-output class S modulator (270), a driver amplifier (250), and a power amplifier (260). The multi-output class S modulator (270) amplifies the envelope of the input signal and generates a primary amplified envelope signal and at least one offset amplified envelope signal. The offset amplified envelope signal is used to modulate the driver amplifier (250), and the primary amplified envelope signal is used to modulate the power amplifier (260).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.