Multiple power mode amplifier with bias modulation option and without bypass switches
US7420412B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Sep 19, 2007 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Sep 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is reduced, which will increase operation time, especially important for battery-operated devices. In one implementation, the amplifier includes a number of impedance matching network units (130, 140, 150, and 160), impedance transformer (170), and a power stage (120). An implementation provides further power consumption savings by modulating a bias of an amplifier stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.