Radio-frequency power amplifier with fast envelope tracking
US8669811B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2011 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Nov 16, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/504
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radio-frequency power amplifier with envelope tracking, comprising: a power RF amplifying device for amplifying a RF signal; and a switching DC/DC converter, comprising a switching device and a rectifying device, for providing said power RF amplifying device with a DC power supply at a voltage level proportional to an envelope of said RF signal; wherein said switching device is a RF power transistor; characterized in that said rectifying device, and preferably also said power RF amplifying device, is also a transistor of a same technology, connected as a two-terminal device. Preferably, said power RF amplifying device is also a transistor of said same technology. A low-pass filter can also be provided for reducing the bandwidth of the envelope signal on which the PWM signal driving the DC/DC converter depends.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.