Method and apparatus for automatically balancing a radio-frequency mixer
US5862466A · kind A · utility
20Cited by
10References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1997 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Jan 9, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D2200/009
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An automatic balancing circuit for a radio frequency mixer which reduces LO-IF signal leakage, as well as minimizing second order harmonic distortion products is described. The circuit couples to in-phase and out-of-phase signal lines originating from the mixer, and comprises a differential gain network, a differential phase shift network and a combiner. The networks operate under the control of a microprocessor, which adjusts the networks so that the LO leakage signals, when combined, are almost completely eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.