Broadband envelope tracking
US10250194B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2016 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Mar 30, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/504
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An envelope tracking scheme can be used, such as to modulate a supply node of a power amplifier circuit to improve efficiency. For example, a magnitude or amplitude envelope of a signal to be modulated can be scaled and used to drive a node, such as a drain, of the power amplifier circuit. An envelope tracking signal can be generated such as having a bandwidth that is compressed as compared to a full-bandwidth envelope signal. A peak-value “look ahead” technique can be used, for example, so that amplitude compression or clipping of the transmit signal is suppressed when the bandwidth-compressed envelope tracking signal is used to modulate a supply node of the power amplifier used to amplify the transmit signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.