Television receiver with tuner capable of receiving air and CATV

Details Television receiver with tuner capable of receiving air and CATV Television receiver with tuner capable of receiving air and CATV

1975-03-27

1977-01-11

Murray, Richard

Telegraphy

Systems

Printing

325465, 178DIG15, H04B 116

Patent

active

040029867

ABSTRACT:
A television receiver having a varactor diode tuned VHF tuner is operable with airborne and cable-connected signals. Bandswitch-controlled diodes change the values of inductive reactance in the tuner stages so the varactor diodes can tune to signals in the VHF Lo and Hi bands and CATV Mid and Super bands. Automatic bandswitching circuitry is included to enable reception of VHF channels 2-13 and UHF channels when operating in the air signal mode and VHF channels 2-13 and CATV Mid (A--I) and Super band (J--Z) channels when operating in the cable signal mode.

REFERENCES:
patent: 3544903 (1970-12-01), Sakamoto
patent: 3646450 (1972-02-01), Ma
Anderson, Details of the New RCA Cable Receivers, Electronic Servicing, Oct., 1973, p. 18.

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