Signal tuning with variable intermediate frequency for image rejection and methods
US9184776B2 · kind B2 · utility
1Cited by
6References
34Claims
0Family size
Inventors
Key dates
| Filing date | Jan 11, 2011 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Oct 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1027
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a method and apparatus for operating a super-heterodyne receiver, a tuning circuit has a local oscillator for frequency shifting a desired channel to a selected frequency and a controller for controlling the local oscillator. The controller determines for each of a number of identified channels, whether an image signal is present at frequencies in the spectrum that when tuned to a first selected frequency interfere, and is operable to select a modified selected frequency at which interference between the image signal and the identified channel is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.