Amplifier circuit, radio transmitter, method and use
US6633199B2 · kind B2 · utility
28Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/451
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier circuit for delivering an output signal which varies in amplitude and in phase or frequency, has a power amplifier, an amplitude feedback circuit and a phase or frequency feedback circuit, both constituting closed loops together with said power amplifier, and at least one of said feedback circuits has its gain controllable in dependency of properties of the input or output signals, or both. A radio transmitter includes such an amplifier circuit, and a cellular telephone includes such a radio transmitter. The invention includes a method for controlling an output state in such a radio transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.