Method and apparatus for isolating IIC bus noise from a tuner in a television receiver
US7847866B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2007 |
| Grant date | Dec 7, 2010 |
| Priority date | — |
| Expiry date | Sep 6, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for isolating a noise intolerant device, e.g., a phase-lock loop of a tuner within a television receiver, from source of noise. In one embodiment, the apparatus isolates a phase-lock loop integrated circuit (IC) from the bus, by providing an isolation buffer that allows the receiver to only pass data to the tuner's phase-lock loop IC when a tune command is issued by a processor. When not being tuned, the IIC lines to the tuner are held HIGH by a buffer until needed again to perform the tuning function. This allows the demodulation circuitry to use a setting for a carrier tracking-loop that optimizes bit error rate performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.