Method and apparatus for automatically controlling an XNN® enhancement circuitry feeding a power amplifier
US8193860B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2007 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Nov 21, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/0222
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for automatically controlling the operation of a DC power enhancement circuitry connected to an RF power amplifier (PA) that operates at various input signal levels, according to which the instantaneous magnitude of the input signal is sensed and the instantaneous magnitude and its highest (lowest) peak are stored. For the time period during which the peak remains the highest (lowest) peak, the desired dynamic range of the power amplifier is determined according to the peak and a corresponding threshold level and the gain of the enhancement circuitry are determined according for that time period. Whenever the magnitude exceeds the corresponding threshold level, the enhancement circuitry provides to the power amplifier a level of DC power enhancement required for maintaining the output power of the power amplifier within the output dynamic range. Whenever a higher (lower) peak is detected, the process is repeated for the time period during which the lower peak remains the highest (lowest) peak of all preceding peaks and the value of the stored highest (lowest) peak is updated accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.