Television receiver with a dual tuner system

Details Television receiver with a dual tuner system Television receiver with a dual tuner system

1992-11-09

1994-02-08

Groody, James J.

Television

Receiver circuitry

Tuning

348565, 348734, H04N 5445

Patent

active

052852849

ABSTRACT:
A television receiver having first and second tuners which can receive the same frequency band and display multiple-surfaces includes key inputting means for indicating that the display of a second tuner picture in a plurality of tuners is on or off and channel selection controlling means for making the second tuner an ordinary selected condition when the key inputting means indicates that the display of the second tuner picture is on and fixing the second tuner's local oscillation frequency so as to set a frequency received by the second tuner outside a receivable frequency band when the key inputting means indicates that the display of the second tuner picture is off. Thereby, mutual beat interference between the plurality of tuners is eliminated.

REFERENCES:
patent: 3639840 (1972-02-01), Shekel et al.
patent: 4238773 (1980-12-01), Tsuboka et al.
patent: 4270212 (1981-05-01), Furukawa
patent: 4682234 (1987-07-01), Naimpally
patent: 4729028 (1988-03-01), Micic et al.
patent: 5045948 (1991-09-01), Streck et al.

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