Pulse-elimination pulse-width modulation
US7863956B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 6, 2008 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Dec 30, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Instead of reducing the pulse widths of all pulses simultaneously in order to reduce the output power of a switched-mode amplifier linearized by a pulse-width modulator, the width of every other (or every n-th) pulse is reduced. When the widths of the selected pulses have been reduced to zero, the amplifier's output power can be further reduced by selecting further pulses from the remaining non-zero-width pulses, and reducing the widths of those pulses. For example, after every other pulse of an original output signal has been removed, every other pulse of the remaining pulses can be reduced to obtain still lower amplifier output power. In this way, the number of pulses (and thus the number of switching transitions) is reduced for small signals, and therefore the amplifier's switching losses are reduced and efficiency is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.