Methods and apparatus for envelope tracking system
US9065509B1 · kind B1 · utility
83Cited by
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23Claims
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Assignee
Inventors
Key dates
| Filing date | Jan 9, 2014 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Jan 9, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0416
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A communication unit includes a radio frequency, RF, transmitter having: a power amplifier, PA, module; and an envelope tracking system operably coupled to the PA module and having a supply modulator arranged to variably control a supply voltage for the PA module in response to a number of input samples of an envelope signal; wherein the envelope tracking system further includes at least one slew rate module arranged to re-distribute a maximum slew rate across the number of input samples in a provision of a variable power supply to the PA module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.