RF power amplifier controller circuit with compensation for output impedance mismatch
US7761065B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2007 |
| Grant date | Jul 20, 2010 |
| Priority date | — |
| Expiry date | Aug 27, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/99
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power amplifier controller circuit controls a power amplifier based upon an amplitude correction signal indicating the amplitude difference between the amplitude of the input signal and an attenuated amplitude of the output signal. The power amplifier controller circuit comprises an amplitude control loop and a phase control loop. The amplitude control loop adjusts the supply voltage to the power amplifier based upon the amplitude correction signal. The amplitude control loop may also compensate for impedance mismatch with the load by increasing the power delivered from the power amplifier to the load, or decrease the output power of the power amplifier upon detection of excessive power dissipation in the power amplifier. The phase control loop adjusts the phase of the input signal based upon a phase error signal indicating a phase difference between phases of the input signal and the output signal to reduce phase distortion generated by the power amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.