Doherty amplifier
US8471638B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 29, 2011 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Sep 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2201/3233
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier includes a Doherty amplifier composed of a distributor distributing an input signal to two signals, a carrier amplifier that receives one of the two signals and has a first FET, a peaking amplifier that receives the other one of the two signals and has a second FET, and a combiner that transforms an output impedance of the carrier amplifier and combines outputs of the carrier amplifier and the peaking amplifier, and a voltage controller that changes at least one of a gate voltage and a drain voltage supplied to at least one of the first FET and the second FET in accordance with a frequency of the input signal when the frequency of the input signal varies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.