Circuit for baseband harmonic rejection
US9369261B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 17, 2013 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Jul 6, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/0475
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit for reducing counter-intermodulation in a modulated signal caused by an oscillator frequency and harmonics of a baseband signal is disclosed. The circuit comprises a first and a second baseband section arranged for generating a first and a second version of a baseband signal, the second version being phase shifted with respect to the first version. The circuit further comprises three signal paths comprising mixers for multiplication of the first and second version of the baseband signal with a local oscillator signal, so that three upconverted signals with rotated phase with respect to each other are obtained, and arranged for applying a scaling with a scaling factor corresponding to the rotated phases. The circuit further comprises a combination unit arranged for combining the three upconverted signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.