Power amplification device, and transmission device and communication device using same
US8344781B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2009 |
| Grant date | Jan 1, 2013 |
| Priority date | — |
| Expiry date | Dec 28, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/21142
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
To provide a power amplification device that can amplify an input signal having an envelope variation with high power-added efficiency in a wide frequency range, and a transmission device and a communication device using the power amplification device. A first orthogonal signal (Sd1) is generated by performing vector subtraction between first and second fundamental signals (Su1 and Su2) having the same amplitude and a phase difference δθ (0 degrees<δθ<180 degrees) therebetween. First and second fundamental signals are generated based on an input signal (Sin). A second orthogonal signal (Sd2) is generated by performing vector addition between the first and second fundamental signals (Su1 and Su2). First and second constant envelope signals (S1 and S2) are generated by performing vector addition between the second fundamental signal (Su2) and first and second constant envelope vector generation signals (e and −e) obtained based on the first fundamental signal (Su1). An output signal (Sout) obtained by amplifying the input signal (Sin) is output based on the first and second constant envelope signals (S1 and S2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.