Power amplification apparatus, and mobile communication terminal apparatus
US7224221B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 7, 2005 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jun 2, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/045
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplification apparatus includes, between a first amplification element for amplifying an input signal and a first output terminal, a second amplification element for further amplifying the input signal amplified in the first amplification element to output to the first output terminal, and a first switch element for controlling the second amplification element to be stop condition. Further, between the first amplification element and a second output terminal, a second switch circuit for controlling the supply of an output from the first amplification element to the second output terminal is provided. When outputting a medium power, the operation efficiency of the power amplification apparatus is improved by reducing a power consumption. Thereby, a total operation efficiency of the power amplification apparatus which outputs either the input signal amplified to a large power or the input signal amplified to a medium power by switching is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.