Bias control circuit and method of controlling bias of RF power amplifier
US7439806B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2007 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Apr 19, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A bias control circuit for an RF amplifier having an output device for providing an output signal to a load and a driver device for driving the output device includes a current mirror circuit for providing a driver device bias current to the driver device and an output device bias current to the output device. When the amplifier operates in a high power mode, the current mirror circuit supplies the driver device bias current at a level to turn on the driver device at a high current level and an output device bias current to turn on the output device. When the amplifier operates in a low power mode, the current mirror circuit supplies a driver device bias current to turn on the driver device at a reduced current level and an output device bias current to turn off the output device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.