Composite amplifier
US6639464B2 · kind B2 · utility
18Cited by
6References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Dec 5, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A composite amplifier includes a main power amplifier (10) and an auxiliary power amplifier (12), which are connected to a load (26) over a Doherty output network. An attenuator (34) is provided for activating the auxiliary power amplifier (12) before the main amplifier (10) is saturated. Preferably the input drive voltage to the auxiliary power amplifier (12) is increased along a smooth curve as the input signal amplitude to the composite amplifier increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.