Sharp-tuned filter-combiner for combining adjacent TV channels

Details Sharp-tuned filter-combiner for combining adjacent TV channels Sharp-tuned filter-combiner for combining adjacent TV channels

2007-05-29

2007-05-29

Yenke, Brian P. (Department: 2622)

Television

Format

Broadband

C348S021000, C348S723000, C348S724000, C348S725000, C348S731000, C375S350000, C455S091000

Reexamination Certificate

active

10239536

ABSTRACT:
A filter-combiner for combining television signals from adjacent channels is presented herein. The combiner has two inputs that respectively receive an NTSC combined visual and aural signal and a DTV signal wherein the NTSC signal and the DTV signal are in adjacent channels. The DTV signal is of greater frequency than the NTSC signal. A combined output signal is provided at an output of the combiner. The combiner has sharp tuned filtering interposed between the inputs and the output and tuned to pass the DTV signal while reflecting the NTSC signal such that the passed DTV signal and the reflected NTSC signal combine as the combined output signal.

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