Demodulated chrominance signal filter using impedance mismatched

Details Demodulated chrominance signal filter using impedance mismatched Demodulated chrominance signal filter using impedance mismatched

1983-04-26

1985-08-20

Murray, Richard

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 9535

Patent

active

045367884

ABSTRACT:
A filter network suitable for translating a signal such as a demodulated "I" chrominance component of a composite color television signal is disclosed. The filter network comprises first and second cascaded sections with mutually grossly mismatched terminating impedances, and are passively interconnected via a resistance of a value which substantially precludes interaction between the sections over a given range of frequencies within the passband of the signals being translated. Both sections are separately excited with signals to be translated. The first section provides wideband filtering and a large amount of delay relative to that provided by the second section. The second section provides signal amplitude peaking within a given portion of the frequency passband of the first section.

REFERENCES:
patent: 2816952 (1957-12-01), Lockhart
patent: 2831919 (1958-04-01), Lockhart
patent: 2908752 (1959-10-01), Lockhart
patent: 3852523 (1974-12-01), Humphrey
patent: 4371891 (1983-02-01), Yost

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