Efficient parallel-stage power amplifier
US5974041A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1995 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Dec 27, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0408
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier circuit for providing an amplified signal in response to an input signal. The amplifier circuit includes an input network for applying the input signal to a selected at least one of a plurality of amplifier stages. An output network is provided for coupling the amplified signal from the selected at least one amplifier stage. The appropriate amplifier stage is selected by a control circuit in response to a desired power value of the amplified signal. By selectively activating only the amplifier stage(s) that are necessary to provide the desired level of output power, increased DC efficiency can be accomplished in applications that require an amplifier which operates linearly over a wide dynamic range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.