Method and apparatus for increasing the linearity of the phase and gain of a power amplifier circuit
US6107880A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 1998 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Aug 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/0261
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides for a method and apparatus for increasing the linearity of the phase and gain of an amplifier circuit (10, 22). The amplifier circuit (10, 22) maintains linearity of the amplified output signal by monitoring the power levels of the input signal, and adjusting the supply voltage level(s) of the amplifier (18), based upon the measured input power levels. By appropriately adjusting the supply voltage level(s) of the amplifier (18) an output signal having a consistent gain and phase can be realized. Preferably a delay circuit (26) will be used to delay receipt of the input signal by the amplifier (18), so as to synchronize receipt of the input signal with the corresponding source voltage adjustments. The value of the delay preferably corresponds to the time for the envelope detector (14) to measure the instantaneous input power levels and the time for the processing unit (16) to determine and apply the appropriate supply voltage level(s) to the amplifier (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.