Quadrature pulse-width modulation methods and apparatus
US8179957B2 · kind B2 · utility
5Cited by
3References
15Claims
0Family size
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Key dates
| Filing date | Jun 9, 2008 |
| Grant date | May 15, 2012 |
| Priority date | — |
| Expiry date | Feb 15, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/217
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Switched-mode amplifiers and devices having such amplifiers include quadrature pulse-width modulation that is based on cartesian (as opposed to polar) coordinates. Two sets of pulses that represent respective in-phase and quadrature components of a conventional cartesian-coordinates input signal can be combined such that the combined set of pulses can be provided to a switched-mode amplifier without nonlinear cartesian-to-polar transformation and its associated wider internal bandwidth and other problems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.