Switched modulation of a radio-frequency amplifier
US7932790B2 · kind B2 · utility
5Cited by
3References
18Claims
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Key dates
| Filing date | Oct 27, 2006 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | May 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/5483
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Switch-modulation of a radio-frequency power amplifier by-representing the input signal by the I-signal (1) and Q-signal (9) of the complex components (I+j−Q), and pulse width modulating the I-signal and the Q-signal separately to create a modulated I-signal pulse sequence (3a) and a modulated Q-signal pulse sequence (3b). Further, the pulses corresponding to negative sample values are time-shifted relative the pulses corresponding to positive sample values, and each pulse of the I-signal pulse sequence is delayed by introducing a delaying time shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.