IF Bandpass shaping circuits

Details IF Bandpass shaping circuits IF Bandpass shaping circuits

1980-09-24

1982-02-16

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

333193, H04N 544, H03H 900

Patent

active

043162207

ABSTRACT:
An IF bandpass shaping circuit for use with a television receiver having a tuner for providing intermediate frequency signals comprises a surface acoustic wave (SAW) filter coupled to the tuner. The SAW filter provides a predetermined bandpass response. A tuned circuit is coupled between the tuner and the output of the SAW filter. The tuned circuit is responsive to a frequency bandwidth which is narrow relative to the response of the SAW filter. The tuned circuit response is added to the output of the SAW filter to provide a modified SAW filter response.

REFERENCES:
patent: 3621482 (1971-11-01), Adler
patent: 3872387 (1975-03-01), Banach
patent: 3911381 (1975-10-01), Brooks et al.
patent: 4006290 (1977-02-01), Momberger et al.
patent: 4107730 (1978-08-01), Jones
patent: 4126837 (1978-11-01), Koyamada et al.

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