Dynamic power sharing zero intermediate frequency (ZIF) mixer and method of forming same
US7085549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2002 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Mar 1, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/007
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A zero intermediate frequency (ZIF) radio frequency (RF) digital mixer (200) includes a low noise amplifier (LNA) (203), a first RF mixer stage (205) for mixing an RF signal from the at least one LNA with a first local oscillator signal operating a first predetermined frequency. A second RF mixer stage (207) is then utilized for mixing in-phase (I) and quadrature (Q) digital signals from the first RF mixer stage (205) with a plurality of second local oscillator signals (LO) operating at a second predetermined frequency. The invention significantly improves current drain by eliminating the need for a linear transconductance stage while still maintaining high degrees of isolation and linearity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.