Apparatus and methods for envelope tracking in a mobile device
US9668215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2016 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Feb 8, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods for envelope tracking in a mobile device are disclosed herein. In certain configurations, a method includes amplifying a radio frequency (RF) input signal using a power amplifier, providing power to the power amplifier from a power amplifier supply voltage, controlling a voltage level of the power amplifier supply voltage based on a control voltage using a DC-to-DC converter, adjusting the voltage level of the power amplifier supply voltage based on an envelope of the RF input signal using an error amplifier, low pass filtering the power amplifier supply voltage to generate a filtered voltage using a low pass filter, and generating the control voltage based on comparing the filtered voltage to a reference voltage using a comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.