Television receiver I. F. circuitry

Details Television receiver I. F. circuitry Television receiver I. F. circuitry

1975-06-04

1976-03-30

Griffin, Robert L.

Telegraphy

Systems

Simplex-reversing periodic

325379, 325381, 325383, 325386, 325488, H04N 544, H04B 116

Patent

active

039476294

ABSTRACT:
A television receiver comprising a first printed circuit board having a helical resonator filter, an adjacent channel trap circuit and an impedance converter circuit for providing a reduced output impedance, the first printed circuit board being secured to the tuner casing, and a second printed circuit board having first and subsequent i-f amplifier stages, the two printed circuit boards being connected to each other, whereby good skirt characteristics can be simply obtained. Also, no overall adjustment is required but the tuner and i-f amplifier may be adjusted separately, thus providing improved serviceability.

REFERENCES:
patent: 2356308 (1944-08-01), Fredendall
patent: 3217096 (1965-11-01), Caprio et al.
patent: 3381236 (1968-04-01), Davis
patent: 3387214 (1968-06-01), Meyer
patent: 3584141 (1971-06-01), Kobe et al.
patent: 3624515 (1971-11-01), Rezek et al.
patent: 3723884 (1973-03-01), Asplin

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