Composite amplifier
US7071774B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2002 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Oct 29, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3282
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A composite amplifier includes a first and a second power amplifier connected to a Chireix output network. A signal component separator and an IQ separator provide equal first and linear drive signal components that depends linearly on the amplitude A(t) of an amplitude modulated input signal. The signal component separator and IQ separator provide first and second nonlinear drive signal components that have the same magnitude but opposite signs and depend non-linearly as √1−A(t) on the amplitude A(t) and are in quadrature to the first and second linear drive signal components. Amplitude-phase adjusters individually adjust amplitudes and phases of the drive signal components to lower drive power consumption. Summers form a first composite drive signal to the first power amplifier by adding the adjusted first linear drive signal component to the adjusted first non-linear drive signal component a second composite drive signal to the second power amplifier by adding the adjusted second linear drive signal component to the adjusted second non-linear drive signal component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.