Multi-mode bias modulator and envelope tracking power amplifier using the same
US9559637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2015 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Feb 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An envelope tracking power amplifier is disclosed herein. The envelope tracking power amplifier includes a multi-mode bias modulator and a power amplifier. The multi-mode bias modulator generates an envelope-modulated bias voltage from the envelope signal of an radio frequency (RF) signal whose power is to be amplified by using a linear amplifier and a switching amplifier each having varying current driving capability in response to an operation mode control signal that determines any one of low-level mode and high-level mode. The power amplifier is biased in response to the envelope-modulated bias voltage, amplifies the RF signal, and outputs the amplified RF signal to an antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.