Tuner of the type having zero intermediate frequency and corresponding control process
US7106808B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2001 |
| Grant date | Sep 12, 2006 |
| Priority date | — |
| Expiry date | May 27, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3089
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A tuner includes an analog block, a digital block, and an analog/digital conversion stage connected therebetween. The analog block includes a first attenuator/controlled-gain amplifier stage connected upstream to a frequency transposition stage. The overall mean power of the entire signal received by the tuner is calculated during a phase of initialization. This overall calculated power is compared in the digital block with a first predetermined reference value corresponding to a maximum power desired at a predetermined location of the analog block. The gain of the first attenuator/amplifier stage is adjusted to minimize the deviation between the overall calculated power and the reference value. In a phase of normal operation, one of the channels of the signal received is selected, with the gain of the first attenuator/amplifier stage being fixed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.