Image rejection mixer providing precision image rejection
US7369835B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2005 |
| Grant date | May 6, 2008 |
| Priority date | — |
| Expiry date | Jun 22, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An image rejection mixer includes a first mixer, a second mixer, a first output adjust circuit, and a second output adjust circuit. The first mixer is coupled to receive an input RF signal and a local oscillator signal and includes a first mixer stage and a first output load stage. The second mixer is coupled to receive the input RF signal and a phase-converted local oscillator signal and includes a second mixer stage and a second output load stage. The first output adjust circuit is coupled to the first output load stage for modifying the signal waveform of a first output signal of the first mixer. The second output adjust circuit is coupled to the second output load stage for modifying the signal waveform of a second output signal of the second mixer. In this manner, the near-perfect image rejection result in the final IF signal can be obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.