Amplifier linearization using magnetically coupled feedback provided by a transformer coupled to a balun-based load
US12160203B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2021 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Jun 20, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45731
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier circuit includes an amplifier having an amplifier input and an amplifier output. The amplifier circuit includes a transformer having a primary winding in series with the amplifier output and a secondary winding coupled to the amplifier input. The primary winding and the secondary winding are arranged such that a portion of a magnetic field generated by the primary winding couples to the secondary winding through a magnetically coupled feedback loop, thereby providing feedback from the amplifier output to the amplifier input. An output load arrangement is connected to the primary winding wherein the output arrangement includes a balun. The amplifier circuit may be implemented as an integrated circuit and where the primary and secondary windings are integrated in different metal layers of the integrated circuit or are otherwise arranged to effect a desired degree of magnetic coupling and feedback from the amplifier output to the amplifier input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.