Power amplifier with controllable feedback loop
US7388428B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Feb 2, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/36
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a power amplifier for amplifying an electronic input signal (51) and a multi-band capable frontend with such power amplifier. The power amplifier comprises an amplifier transistor stage (1) having an input (52) and an output (53) and a feedback loop (4) placed between the output (53) and the input (52) of the amplifier transistor stage (1). The feedback loop (4) comprises a capacitor (41) and a resistive element (44) in a RF path and an inductive element (42) in a DC feed path, wherein said resistive element comprises a feedback transistor (45) arranged as variable resistor within the feedback loop, and a bias control circuit (46).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.