Television signal input filter

Details Television signal input filter Television signal input filter

1985-02-28

1987-02-10

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, 358196, 333176, 455302, 455307, H04N 521, H04N 544

Patent

active

046426914

ABSTRACT:
An input filter for coupling television signals from a signal source such as an antenna to an RF signal processing stage includes series resonant input and output sections shunting the signal path. The input section forms a trap at the video IF frequency. The output section resonates at a frequency other than the sound IF frequency, below the band of television signal frequencies to be processed by the RF signal processing stage. The filter serves to attenuate unwanted stray signals such as video and sound IF components otherwise capable of interfering with and distorting the input television signals.

REFERENCES:
patent: 3204025 (1965-08-01), Przybyszewski
patent: 3217096 (1965-11-01), Caprio
patent: 4263619 (1981-04-01), Theriault
1982 Basic Service Data Bulletin for the RCA CTC-121 television receiver, FIG. 18.

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