Television – Receiver circuitry – Tuning
Reexamination Certificate
2007-08-15
2010-12-07
Tran, Trang U (Department: 2622)
Television
Receiver circuitry
Tuning
C348S607000, C348S725000
Reexamination Certificate
active
07847866
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.
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Search Report Dated Apr. 13, 2000.
Mayer Matthew Thomas
White David Glen
Lin Reitseng
Opalach Joseph J.
Shedd Robert D.
Thomson Licensing
Tran Trang U
LandOfFree
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