发明名称 |
METHOD AND APPARATUS FOR ISOLATING IIC BUS NOISE FROM A TUNER IN A TELEVISION RECEIVER |
摘要 |
<p>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.</p> |
申请公布号 |
EP1228636(B1) |
申请公布日期 |
2004.09.29 |
申请号 |
EP19990968174 |
申请日期 |
1999.12.22 |
申请人 |
THOMSON LICENSING S.A. |
发明人 |
WHITE, DAVID, GLEN;MAYER, MATTHEW, THOMAS |
分类号 |
H04B1/10;H04B1/26;H04N5/21;H04N5/44;(IPC1-7):H04N5/44 |
主分类号 |
H04B1/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|