System and method for closed loop VSWR correction and tuning in RF power amplifiers
US6597244B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 5, 2002 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Feb 5, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/207
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system and method is provided to compensate an amplifier circuit for changes in a load impedance in order to maintain a substantially optimum performance for the amplifier. More specifically, if the load impedance increases, then the amplifier is reconfigured to produce an output impedance that is likewise increased. One way of reconfiguring the amplifier for a load impedance increase is to increase the supply voltage to the device. The increase in the supply voltage to the device increases the rail to rail operation of the device. This would allow more dynamic range for the system performance. Assuming the current is substantially constant, the impedance seen the output of the amplifier will increase and be multiplied up to the impedance desired by the load resulting in a more optimum power transfer. Other parameters, such as the input drive and bias voltage to the amplifier can be changed in order to improve the performance of the amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.