Method of using control loops in a broadband cable tuner
US7196737B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2003 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Jan 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Currently tuner circuits maintain normal power consumption while they are receiving RF signals and do not have provisions therein for disabling portions of their circuitry for reducing of power consumption. For example, during changing of channels, portions of the tuner are not used while the tuner is waiting for channel data. Thus, disabling portions of the circuit while the tuner is waiting for data serves to reduce power consumption of the tuner. Furthermore, tuner power consumption is reduced by determining whether a signal input to the tuner circuit requires amplification or not, or whether linearity in the amplifier can be sacrificed by a reduction in amplifier gain. Thus, a tuner circuit is provided that has control loop circuitry to execute control loops for controlling the gain and linearity of the tuner, as well as power consumption of circuitry therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.