Method and apparatus for cancellation of third order intermodulation distortion and other nonlinearities
US6794938B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Jun 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/3241
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus are provided for substantially reducing and/or canceling nonlinearities of any order in circuits, devices, and systems such as amplifiers and mixers. In particular, methods and apparatus are provided for substantially reducing and/or canceling third order nonlinearities in circuits, devices, and systems such as amplifiers and mixers. A first coupler is used to split an input signal into two equal-amplitude in-phase components, each component is processed by two nonlinear devices with different nonlinearities, and a final combiner, such as a 180-degree hybrid, recombines the processed signals 180 degrees out of phase and substantially reduces and/or cancels the undesired nonlinear distortion components arising due to nonlinearities in the nonlinear devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.