Tuning module for a dual frequency PLL synthesized tuner
US6163687A · kind A · utility
7Cited by
13References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1997 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Jul 22, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/23
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A tuning module tunes a dual frequency PLL synthesized tuner to a desired channel frequency. The dual frequency PLL synthesized tuner includes a first PLL and a second PLL. The tuning module receives a carrier-to-noise ratio ("CNR") for each of one or more signals output from the dual frequency PLL synthesized tuner. The tuning module then generates first PLL parameters and second PLL parameters based on the CNRs and the desired channel frequency. Finally, the tuning module programs the first PLL with the first PLL parameters and programs the second PLL with the second PLL parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.