Radio frequency tuner front end and tuner
US7437133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2002 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Nov 28, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/244
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A front end for a radio frequency tuner, for example for connection to a cable distribution network, including an input connected to a signal path comprising an LNA connected via an AGC stage to a signal splitter. The input path has a bandwidth sufficiently wide to pass all of the channels in an input signal and has a substantially constant voltage standing wave ratio over the bandwidth. The splitter supplies identical signals to several filtering paths, each of which comprises a fixed filter. The paths are selectable one at a time and the filters divide the input frequency band into a plurality of contiguous or slightly overlapping sub-bands. The output of the front end is supplied to, for example, a double conversion arrangement comprising an upconverter and a downconverter with first and second IF filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.