Apparatus and method for direct quadrature power amplifier modulation
US7773693B2 · kind B2 · utility
4Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2005 |
| Grant date | Aug 10, 2010 |
| Priority date | — |
| Expiry date | Sep 16, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/331
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A direct power amplifier modulator that accepts bipolar I and Q data, either baseband or multi-carrier digital IF, and generates the resultant magnitude and sign components. Also described is a direct power amplifier modulator that generates quadrature terms of the carrier frequency offset by 90°, wherein each term is shifted by 180° under control of the respective sign components of the quadrature I and Q samples. The present invention also provides a transistor structure configured to accept differential quadrature frequency components that are combined in a post PA outphasing combiner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.